Eddie Jones is expected to name a maximum of 40 players in England's full World Cup training squad on Thursday.

Saracens and Exeter Chiefs's big guns will be rolled back in for England's third training camp ahead of the autumn's Japan tournament.

Head coach Jones is understood to be keen to keep his training numbers tight, in a bid to avoid any hefty late whittling down to the final 31-man World Cup squad.

The deadline for submitting that final World Cup roster is 2 September, with England starting their campaign against Tonga in Sapporo on 22 September.

Ben Spencer is expected to slot into England's scrum-half options, which could leave one of Gloucester's Willi Heinz or Wasps' Dan Robson vulnerable to dropping out.

Premiership Rugby Team of the Season 2018/19 Show all 16 1 /16 Premiership Rugby Team of the Season 2018/19 Premiership Rugby Team of the Season 2018/19 Premiership Rugby Team of the Season LONDON, ENGLAND - MAY 22: (l-r) John Afoa, Cobus Reinach, Alex Dombrandt and Alex Goode accept the BT Sport Dream Team award on behalf of all of the team during the Gallagher Premiership Rugby Awards 2019 at Royal Lancaster Hotel on May 22, 2019 in London, England. (Photo by Paul Harding/Getty Images for Premiership Rugby) Paul Harding Getty Images for Premiership Rug Premiership Rugby Team of the Season 2018/19 15. Alex Goode (Saracens) COVENTRY, ENGLAND - APRIL 27: Alex Goode of Saracens beats a challenge from Elliot Daly of Wasps during the Gallagher Premiership Rugby match between Wasps and Saracens at Ricoh Arena on April 27, 2019 in Coventry, United Kingdom. (Photo by Alex Livesey/Getty Images) Alex Livesey Getty Images Premiership Rugby Team of the Season 2018/19 14. Santiago Cordero (Exeter Chiefs) Rugby Union - Premiership - Leicester Tigers v Exeter Chiefs - Welford Road Stadium, Leicester, Britain - April 6, 2019 Exeter's Santiago Cordero celebrates after scoring a try Action Images/Andrew Boyers ANDREW BOYERS Action Images Premiership Rugby Team of the Season 2018/19 13. Henry Slade Exeter Chiefs' Henry Slade is tackled by Northampton Saints Piers Francis during the Gallagher Premiership match at Sandy Park, Exeter. PRESS ASSOCIATION Photo. Picture date: Saturday May 18, 2019. RUGBYU Chiefs. Photo credit should read: David Davies/PA Wire. RESTRICTIONS: Editorial use only. No commercial use. David Davies PA Premiership Rugby Team of the Season 2018/19 12. Mark Atkinson (Gloucester) WORCESTER, ENGLAND - APRIL 28: Mark Atkinson of Gloucester breaks with the ball during the Gallagher Premiership Rugby match between Worcester Warriors and Gloucester Rugby at Sixways Stadium on April 28, 2019 in Worcester, United Kingdom. (Photo by David Rogers/Getty Images) David Rogers Getty Images Premiership Rugby Team of the Season 2018/19 11. Ollie Thorley (Gloucester GLOUCESTER, ENGLAND - MARCH 23: Ollie Thorley of Gloucester breaks with the ball during the Gallagher Premiership Rugby match between Gloucester Rugby and Wasps at Kingsholm Stadium on March 23, 2019 in Gloucester, United Kingdom. (Photo by David Rogers/Getty Images) Getty Images Premiership Rugby Team of the Season 2018/19 10. Danny Cipriani GLOUCESTER, ENGLAND - MAY 04: Danny Cipriani of Gloucester Rugby applauds fans as he is substituted off during the Gallagher Premiership Rugby match between Gloucester Rugby and Newcastle Falcons at Kingsholm Stadium on May 04, 2019 in Gloucester, United Kingdom. (Photo by David Rogers/Getty Images) David Rogers Getty Images Premiership Rugby Team of the Season 2018/19 9. Cobus Reinach (Northampton Saints) NEWCASTLE UPON TYNE, ENGLAND - APRIL 26: Cobus Reinach of Northampton Saints passes the ball during the Gallagher Premiership Rugby match between Newcastle Falcons and Northampton Saints at Kingston Park on April 26, 2019 in Newcastle upon Tyne, United Kingdom. (Photo by David Rogers/Getty Images) David Rogers Getty Images Premiership Rugby Team of the Season 2018/19 1. Mako Vunipola (Saracens) Saracens' New Zealand-born English prop Mako Vunipola celebrates their win on the field after the European Rugby Champions Cup final match between Leinster and Saracens at St James Park stadium in Newcastle-upon-Tyne, north east England on May 11, 2019. - Saracens won a third European Champions Cup title in four years with a 20-10 win over Leinster on Saturday. (Photo by Glyn KIRK / AFP)GLYN KIRK/AFP/Getty Images GLYN KIRK AFP/Getty Images Premiership Rugby Team of the Season 2018/19 2. Jamie George (Saracens) Rugby Union - European Champions Cup Quarter Final - Saracens v Glasgow Warriors - Allianz Park, London, Britain - March 30, 2019 Saracens' Jamie George in action with Glasgow Warriors' Jonny Gray Action Images via Reuters/Adam Holt ADAM HOLT Action Images via Reuters Premiership Rugby Team of the Season 2018/19 3. John Afoa (Bristol Bears) BRISTOL, ENGLAND - APRIL 13: John Afoa of Bristol Bears makes a break through during the Gallagher Premiership Rugby match between Bristol Bears and Saracens at Ashton Gate on April 13, 2019 in Bristol, United Kingdom. (Photo by Nathan Stirk/Getty Images) Getty Images Premiership Rugby Team of the Season 2018/19 4. Franco Mostert (Gloucester) GLOUCESTER, ENGLAND - MAY 04: Franco Mostert of Gloucester Rugby passes the ball during the Gallagher Premiership Rugby match between Gloucester Rugby and Newcastle Falcons at Kingsholm Stadium on May 04, 2019 in Gloucester, United Kingdom. (Photo by David Rogers/Getty Images) David Rogers Getty Images Premiership Rugby Team of the Season 2018/19 5. Will Skelton (Saracens) BARNET, ENGLAND - MAY 04: Will Skelton of Saracens is tackled by Ollie Atkins (l) and Richard Capstick of Exeter Chiefs during the Gallagher Premiership Rugby match between Saracens and Exeter Chiefs at Allianz Park on May 4, 2019 in Barnet, United Kingdom. (Photo by Henry Browne/Getty Images) Henry Browne Getty Images Premiership Rugby Team of the Season 2018/19 6. Alex Dombrandt (Harlequins) COVENTRY, ENGLAND - MAY 18: Alex Dombrandt of Harlequins drops the ball just short of the try line during the Gallagher Premiership Rugby match between Wasps and Harlequins at the Ricoh Arena on May 18, 2019 in Coventry, United Kingdom. (Photo by David Rogers/Getty Images) David Rogers Getty Images Premiership Rugby Team of the Season 2018/19 7. Tom Curry (Sale Sharks) Rugby Union - Premiership - Sale Sharks v Gloucester Rugby - AJ Bell Stadium, Sale, Britain - May 18, 2019 Sale Sharks Tom Curry scores his sides first try Action Images/Jason Cairnduff JASON CAIRNDUFF Action Images Premiership Rugby Team of the Season 2018/19 8. Matt Kvesic (Exeter Chiefs) Exeter Chiefs Matt Kvesic is tackled by Harlequins Joe Marler during the Gallagher Premiership match at Sandy Park, Exeter. PRESS ASSOCIATION Photo. Picture date: Saturday April 27, 2019. See PA story RUGBYU Exeter. Photo credit should read: David Davies/PA Wire. RESTRICTIONS: Editorial use only. No commercial use. David Davies PA

Danny Cipriani will be among those eager to stay on at Pennyhill Park, having only joined England's World Cup preparations last weekend.

The Premiership player of the year and players' player of the year was rewarded for a stellar first campaign with Gloucester with a surprise England call-up last week.

But the return of captain Owen Farrell, and the expected addition of playmakers - like Alex Lozowski and Henry Slade - might squeeze out the in-form 31-year-old.

Kyle Sinckler was excluded from last week's 34-man training group, sent back to Harlequins for treatment on a minor hamstring complaint.

Danny Cipriani faces a wait to see if he’ll remain in the England World Cup squad (Getty)

The British and Irish Lions prop will face a nervous wait to discover his fate too, as to whether he will be recalled now or told to continue working on his injury at his club.