Eddie Jones believes that Saracens lock Nick Isiekwe could be the next Maro Itoje after naming the teenager in his 31-man England squad for the summer tour of Argentina, with the head coach naming 15 uncapped players for the trip to South America on what he described as a chance to develop the next generation.

The 19-year-old is among six forwards and nine backs who will join the England senior side for the first time as they play the Barbarians at Twickenham on Sunday 28 May, before embarking on a two-Test tour of Argentina in June.

Isiekwe is handed his first call-up alongside rugby league convert Denny Solomona, the Bath-bound Ospreys flanker Sam Underhill and Auckland Blues fly-half Piers Francis – who joins Northampton Saints ahead of the new season – but Jones paid special attention to the Saracens lock, who made four appearances for the Six Nations Grand Slam-winning England Under-20 side and was handed his first Saracens start just last weekend in the win over Northampton.

“Lock is a focus for us – we want to increase more depth in locks,” Jones said on Thursday. “We have the young guy from Sarries coming in [Isiekwe] who is potentially a very good player. When you look at where he is now compared to where Maro was when he came into the Six Nations, he is going to be a really good player this boy, a really good player. So he is exciting.

“I can’t compare as I didn’t see Maro at that age. What I know is that he can be a very good player if he works hard enough. He is obsessed to want to be great, he has the potential to be a very good player.”

Jones’ admission that he wants more strength in depth at lock is a surprising one, given he has labelled his current options as “world class” in Itoje, George Kruis, Courtney Lawes and Joe Launchbury, the last of which is also named in the squad after missing out on a place in the British and Irish Lions squad – a decision that infuriated Wasps on Wednesday after his excellent Six Nations campaign.

With Itoje, Kruis and Lawes all selected, Launchbury will be one of the seven senior players heading out on the tour that already have more than 40 international caps to their name, though age and experience is not something that Jones is on the lookout for. Given Itoje’s meteoric rise over the last two seasons, that’s hardly surprising, as the Saracens forward will head out on the Lions tour as the youngest member of Gatland’s squad, but also as a Premiership and European Champions Cup winner.

British and Irish Lions squad to tour New Zealand Show all 41 1 /41 British and Irish Lions squad to tour New Zealand British and Irish Lions squad to tour New Zealand <b>Loosehead prop:</b> Joe Marler (England) Age: 26

International caps: 51

Lions caps: 0

Why he’s on the plane: Marler flourished in Mako Vunipola’s absence and kept the Saracens prop out of the England side once he had returned to fitness. The Quins front-row has come of age this season. Getty Images British and Irish Lions squad to tour New Zealand <b>Loosehead prop:</b> Jack McGrath (Ireland) Age: 27

International caps: 41

Lions caps: 0

Why he’s on the plane: McGrath has ousted Cian Healy in the Irish side and proved pivotal to disrupting the English scrum in the Six Nations encounter in Dublin last month. Has also helped Leinster reach the European semi-finals. Getty Images British and Irish Lions squad to tour New Zealand <b>Loosehead prop: </b> Mako Vunipola (England) Age: 26

International caps: 42

Lions caps: 3

Why he’s on the plane: Vunipola looked a certainty on the plane before he suffered a knee injury earlier in the season, but he has returned to full fitness with Saracens and has been one of the standout performers in their return to form since the Six Nations. Getty Images British and Irish Lions squad to tour New Zealand <b>Hooker: </b> Rory Best (Ireland) Age: 34

International caps: 104

Lions caps: 0

Why he’s on the plane: He will head to New Zealand as the oldest member of the Lions squad, though he is yet to play in a Test match while on tour. The Ireland skipper benefitted from Dylan Hartley’s ban in 2013 to tour with the Lions, captaining them in the loss to the Brumbies, but his experience will be valuable to a relatively fresh front-row. Getty Images British and Irish Lions squad to tour New Zealand <b>Hooker: </b> Jamie George (England) Age: 26

International caps: 17

Lions caps: 0

Why he’s on the plane: Probably the form hooker in Europe who can do as good a job from the start of the match as he can do off the replacements’ bench, as he has done so often for England. His only weakness will be that he has never played the All Blacks’ senior side. Getty Images British and Irish Lions squad to tour New Zealand <b>Hooker: </b> Ken Owens (Wales) Age: 30

International caps: 50

Lions caps: 2

Why he’s on the plane: The Scarlets hooker enjoyed a strong Six Nations despite Wales’s struggles, and his physicality at the breakdown will do him well in New Zealand. Getty British and Irish Lions squad to tour New Zealand <b>Tighthead prop: </b> Dan Cole (England) Age: 29

International caps: 74

Lions caps: 3

Why he’s on the plane: The most consistent tighthead in the squad who will offer past experience, current form and the fitness to last 80 minutes if needed. Cole could well force his way into the test side. Getty Images British and Irish Lions squad to tour New Zealand <b>Tighthead prop: </b> Tadhg Furlong (Ireland) Age: 24

International caps: 16

Lions caps: 0

Why he’s on the plane: Enjoyed a brilliant Six Nations tournament along with a purple patch for Leinster, and he is simply a rock in the scrum that even the All Blacks will find difficult to budge. Getty Images British and Irish Lions squad to tour New Zealand <b>Tighthead prop: </b> Kyle Sinckler (England) Age: 24

International caps: 8

Lions caps:0

Why he’s on the plane: He is yet to start a Test for England but that has not stopped his reputation bagging him a spot on the plane to New Zealand. Will add power and pace with the ball, and plenty of character in the changing room that can go a long way to making a difference on a seven-week tour. Getty Images British and Irish Lions squad to tour New Zealand <b>Lock: </b> Iain Henderson (Ireland) Age: 25

International caps: 32

Lions caps: 0

Why he’s on the plane: The forgotten man of Irish rugby provided a timely reminder of why he is rated so highly by helping plot the downfall of England. His versatility will come in handy for the tour where injuries will take their toll, given he can cover lock as well as the back-row. Getty Images British and Irish Lions squad to tour New Zealand <b>Lock: </b> Maro Itoje (England) Age: 22

International caps: 12

Lions caps: 0

Why he’s on the plane: Will head to New Zealand with a target on his back after proving the form player in Europe over the last 18 months. A supremely talented individual with freakish athleticism, who can also make his presence felt at blindside flanker. Getty Images British and Irish Lions squad to tour New Zealand <b>Lock: </b> Alun Wyn Jones (Wales) Age: 31

International caps: 110

Lions caps: 6

Why he’s on the plane: A veteran of two Lions tours already but still only 31 years old, Jones offer everything in terms of leadership, aggression, control and outright ability. Will provide support for captain Sam Warburton, and memorably skippered the 2013 side to victory in the decisive third Test. Getty British and Irish Lions squad to tour New Zealand <b>Lock: </b> George Kruis (England) Age: 27

International caps: 20

Lions caps: 0

Why he’s on the plane: He hasn’t played a game since January but such is his talent in the lineout and his importance to the Saracens and England cause over the last two years that Gatland gave him every chance to prove his fitness. Should get the Lions lineout firing on all cylinders with England coach Steve Borthwick also heading to New Zealand. Getty Images British and Irish Lions squad to tour New Zealand <b>Lock: </b> Courtney Lawes (England) Age: 28

International caps: 58

Lions caps: 0

Why he’s on the plane: Beat England second-row colleague Joe Launchbury to a place in the squad after hitting the form of his life. It’s harsh on the Wasps captain, but Lawes can offer more physicality carrying the ball and a bone-crunching tackle few can equal. Getty Images British and Irish Lions squad to tour New Zealand <b>Flanker:</b> James Haskell Age: 32

International caps: 75

Lions caps: 0

Why he’s on the plane: Because of Billy Vunipola's misfortune. The Saracens No 8 injured his shoulder towards the end of the season that, he decided, needed surgery. Haskell gets the call-up to replace his England teammate, and his inclusion frees up CJ Stander to cover No 8. Getty Images British and Irish Lions squad to tour New Zealand <b>Flanker: </b> Sean O’Brien (Ireland) Age: 30

International caps: 49

Lions caps: 2

Why he’s on the plane: One of those who will not shirk responsibility in going toe-to-toe with the All Blacks, O’Brien is an immensely powerful flanker who can be a nuisance at the breakdown. Could well prove Gatland’s impact replacement in the Tests. Getty Images British and Irish Lions squad to tour New Zealand <b>Flanker: </b> Peter O’Mahony (Ireland) Age: 27

International caps: 40

Lions caps: 0

Why he’s on the plane: For two reasons. The first is guiding Munster through a hugely emotional season that has seen them reach the European Champions Cup last four, the second is for his man of the match display at the Aviva Stadium to shoot down England. Getty Images British and Irish Lions squad to tour New Zealand <b>Flanker: </b> CJ Stander (Ireland) Age: 27

International caps: 15

Lions caps: 0

Why he’s on the plane: The South African-born back-row may have been playing against the Lions had fate taken a different path, but instead he will head to New Zealand as one of the form players in Europe. Likely to be used as No 8 cover, but could bag himself a starting role on the blindside. Getty Images British and Irish Lions squad to tour New Zealand <b>Flanker: </b> Justin Tipuric (Wales) Age: 27

International caps: 51

Lions caps: 1

Why he’s on the plane: The closest thing the Lions have to a natural openside, and offers the pace of an outside centre to help him to the breakdown. Could well be used in tandem with Warburton if Gatland chooses to stick with what he knows best. Getty Images British and Irish Lions squad to tour New Zealand <b>Flanker: </b> Sam Warburton (Wales) Age: 28

International caps: 74

Lions caps: 2

Why he’s on the plane: Emulates Martin Johnson as a two-time Lions captain, and should have enough time to regain his fitness after suffering a six-week knee injury. Flourished at blindside for Wales in the Six Nations but could find himself back in the No 7 shirt. Getty Images British and Irish Lions squad to tour New Zealand <b>No 8: </b> Taulupe Faletau (Wales) Age: 26

International caps: 66

Lions caps: 1

Why he’s on the plane: What he failed to show in the Six Nations, he has delivered at Bath, and a brilliant performance at Twickenham to help see off Leicester Tigers provided a reminder of why he will push Billy Vunipola hard for the starting jersey. Getty Images British and Irish Lions squad to tour New Zealand <b>No 8: </b> Ross Moriarty (Wales) Age: 23

International caps: 17

Lions caps: 0

Why he’s on the plane: Another surprise name but his form in the Six Nations was stunning as he kept Faletau out of the Wales side. He completes an incredibly powerful back row selection. Getty British and Irish Lions squad to tour New Zealand <b>Scrum-half: </b> Conor Murray (Ireland) Age: 27

International caps: 57

Lions caps: 2

Why he’s on the plane: Has struggled with injury of late but when fit he offers so many options from scrum-half. An accurate passer who has a telepathic understanding with Jonathan Sexton, his box-kicks are accurate and he is also a smart runner. Getty Images British and Irish Lions squad to tour New Zealand <b>Scrum-half:</b> Greig Laidlaw (Scotland) Age: 31

International caps: 58

Lions caps: 0

Why he’s on the plane: Ben Youngs' withdrawal from the squad after his sister-in-law and wife of older brother, Tom, learned she was terminally ill left Gatland needing another scrum-half. After returning from the ankle injury he suffered during the Six Nations, Laidlaw was next in line for Gatland, with the Lions coach taking no time at all to call-up the Scotland captain to the squad. Getty British and Irish Lions squad to tour New Zealand <b>Scrum-half: </b> Rhys Webb (Wales) Age: 28

International caps: 28

Lions caps: 0

Why he’s on the plane: The most dangerous No 9 in the squad who has the ability to change a game in a heartbeat. Another who excelled during the Six Nations, and while he needs to keep calm and not give away needless penalties during the tour, he should prove a useful impact off the bench. Getty Images British and Irish Lions squad to tour New Zealand <b>Fly-half: </b> Dan Biggar (Wales) Age: 27

International caps: 56

Lions caps: 0

Why he’s on the plane: Perhaps a surprise inclusion ahead of George Ford and Finn Russell, Biggar gets the nod thanks to the trust Gatland has in his big-game temperament and his reliability with the boot, both from hand and the tee. Getty Images British and Irish Lions squad to tour New Zealand <b>Fly-half: </b> Jonathan Sexton (Ireland) Age: 31

International caps: 66

Lions caps: 3

Why he’s on the plane: One of the Lions’ key players in 2013 and crucial to both the Leinster and Ireland cause, Sexton provided a timely reminder of why he’s so important to this squad during the Six Nations with three wonderful performances. Getty Images British and Irish Lions squad to tour New Zealand <b>Centre: </b> Jonathan Davies (Wales) Age: 29

International caps: 64

Lions caps: 3

Why he’s on the plane: Davies was always likely to make the squad thanks to his contribution in 2013, and while he has not quite matched those levels with his recent form, he is still a powerful unit that can be a handful for the defence to stop. Getty Images British and Irish Lions squad to tour New Zealand <b>Centre: </b> Owen Farrell (England) Age: 25

International caps: 52

Lions caps: 1

Why he’s on the plane: They don’t come more dependable than Farrell, who is adept at playing in both the 10 and 12 shirt at a world class standard. Could line up alongside Sexton in the Test side, but also has the ability to oust him completely. Getty Images British and Irish Lions squad to tour New Zealand <b>Centre: </b> Robbie Henshaw (Ireland) Age: 23

International caps: 29

Lions caps: 0

Why he’s on the plane: Has quickly developed into one of Ireland’s most influential players thanks to his defensive doggedness and smart understanding of the play in front of him. Well in the mix for a starting Test spot. Getty Images British and Irish Lions squad to tour New Zealand <b>Centre: </b> Jonathan Joseph (England) Age: 25

International caps: 33

Lions caps: 0

Why he’s on the plane: He wasn't expected to be named in the squad but Gatland admitted he and his coaches were still arguing about personnel with less than 24 hours to go. He has the X factor that no other centres on the tour have. Getty British and Irish Lions squad to tour New Zealand <b>Centre: </b> Jared Payne (Ireland) Age: 31

International caps: 20

Lions caps: 0

Why he’s on the plane: A real surprise but given Gatland's fondness for Kiwi-born players in this squad. A powerful runner and did well alongside Henshaw. He was also part of the group of Irish players who has a Test victory over New Zealand under their belts. AFP/Getty Images British and Irish Lions squad to tour New Zealand <b>Centre: </b> Ben Te’o (England) Age: 30

International caps: 8

Lions caps: 0

Why he’s on the plane: The New Zealand-born Samoan rugby league international who at 30 years old has just eight international rugby union caps to his name. Hardly the recipe for Lions selection, but Gatland has clearly been impressed by his direct running and impact from the replacements for England. Getty Images British and Irish Lions squad to tour New Zealand <b>Wing: </b> Elliot Daly (England) Age: 24

International caps: 13

Lions caps: 0

Why he’s on the plane: One of the most exciting talents heading out on the tour who offers versatility across the back line, out-and-out gas and a 60m boot that will keep the opposition honest. Daly is also a lovely runner to watch in full flight, and will prove a useful tourist when the inevitable injuries arrive. Getty Images British and Irish Lions squad to tour New Zealand <b>Wing: </b> George North (Wales) Age: 25

International caps: 69

Lions caps: 3

Why he’s on the plane: A Lions player through and through who has already delivered his fair share of memorable moments from the 2013 tour. He rediscovered his form for Wales in the Six Nations, and is a threat from anywhere on the wing that can really scare the All Blacks. Getty Images British and Irish Lions squad to tour New Zealand <b>Wing: </b> Jack Nowell (England) Age: 24

International caps: 23

Lions caps: 0

Why he’s on the plane: Another interesting choice from Gatland, but there is no doubting what Nowell offers the Lions. A tough line-breaker who is equally adept at finishing off tries, as his 11 scores for England demonstrate, and he has taken full advantage of the final few weeks to impress with the Exeter Chiefs. Getty Images British and Irish Lions squad to tour New Zealand <b>Wing: </b> Tommy Seymour (Scotland)

Age: 28

International caps: 36

Lions caps: 0 Why he’s on the plane: Has shown his lethal finishing for Scotland after breaking into the side four years ago and is one who has gone slightly under the radar, doing all the basics to a very high level with Glasgow, to cement his place on the plane. Getty Images British and Irish Lions squad to tour New Zealand <b>Wing: </b> Anthony Watson (England) Age: 23

International caps: 26

Lions caps: 0

Why he’s on the plane: Looked to be one of the more likely Test starters back at the start of the year, but injuries have severely hampered him to the point he will have doubted his place in the squad completely. A return to fitness just in time to participate in the demolition of Scotland before bagging two tries for Bath against Leicester provided Gatland with a timely reminder of his talents. Getty Images British and Irish Lions squad to tour New Zealand <b>Full-back:</b> Leigh Halfpenny (Wales) Age: 28

International caps: 71

Lions caps: 3

Why he’s on the plane: Halfpenny was brilliant in the 2013 series and put 49 points past the Wallabies in just three Tests. His form has dipped over the past year, but Gatland clearly trusts the Toulon star and he also brings a reliability with the boot from 60m. Getty Images British and Irish Lions squad to tour New Zealand <b>Full-back: </b> Stuart Hogg (Scotland) Age: 24

International caps: 53

Lions caps: 0

Why he’s on the plane: One of the most dazzling runners on world rugby who can produce miracles is given a yard of space. He will be tested in the air, but can inflict fear among the New Zealand defence. Toured in 2013 but was left out of the Tests. Getty Images British and Irish Lions squad to tour New Zealand <b>Full-back: </b> Liam Williams (Wales) Age: 26

International caps: 43

Lions caps: 0

Why he’s on the plane: Williams is rapid when given the chance to break and has forced his way into the Wales side, albeit on the wing. Likely to be used more as a full-back in New Zealand, but his reliability under the high ball and desire to come in-field to get involved will interest Gatland. Getty Images

Instead, he wants the likes of Isiekwe and Sale’s back-row twins, Ben and Tom Curry, to challenge the established order and make Jones’s task even harder when he welcomes back his 16-man Lions contingent in November.

“What I want these young guys to do is not wait for the senior players to ask them to do things,” Jones said. “I want them to come into the squad and push the envelope. These Curry boys, I only had to watch them play once. You could see they have got something about them. I want them to come in and raise the intensity of training. I want them to be the new energy in the team.

“The only thing the senior players ought to ask of them is to tone it down. That’s the only thing, and find them a steak restaurant at night. Apart from that I want them to get on with it.”

Semesa Rokoduguni was one of the more notable omissions from the squad (Getty)

While the attention was firmly on those unheralded names that had made the squad, Jones left a number of regular fringe players out. After hinting that he wants to see what the emerging talent can do against the Pumas, Jones did send a message to those who have missed out, namely pick up your game of fall out of his plans.

The most notable omissions came in the wings Marland Yarde, Semesa Rokoduguni and Christian Wade, scrum-half Dan Robson and hooker Tommy Taylor – who had been linked with an outside shot at the Lions – while one of the young players that Jones himself had namechecked earlier in the year in Zach Mercer, the England Under-20 captain, was also a strange absentee.

“Yeah, he knows it,” Jones said of the reason behind Mercer’s omission. “I chatted to him this morning and told him why. That's a private conversation between he and I.”

Under-20s captain Zach Mercer missed out on selection for a reason that will remain private (Getty)

Asked is some of the squad had allowed the levels to drop in the Premiership, Jones said: “Some players definitely.

“I always saw this as an opportunity – 2017 is an opportunity to build the depth of our squad. This is the ideal opportunity to bring young guys through. The talent there is just so exciting – look at it, good young athletes, desperate, desperate to play for England. Every time they play for their club, there are willing to die for their club, obsessed by being great, and if players aren’t like that, then they won’t play for England.”