Forget the result for a moment. Forget about England topping Uefa Nations League Group A4, ahead of Spain and Croatia. And forget about next summer’s jaunt to Porto with the international big boys. No, the clearest sign of the real, inexorable progress England are making under Gareth Southgate came from the nosebleed seats at Wembley, where not a single paper aeroplane found its way floating onto the pitch.

Such is the impact that Southgate has had on this young squad that it is easy to forget that, twelve months ago, the soulless suits at Fifa actually felt moved to issue The FA with an official warning for “improper conduct among spectators” for the paper plane hi-jinks. England had just laboured to a 1-0 victory over the mighty Lithuania and the second-half, at times, resembled an origami version of the Royal International Air Tattoo.

The relationship between the English public and its national team was skirting perilously close to a historic low. No longer. Football may not be coming home — but it’s on the road to Lisbon.

There was little danger of a volley of mocking paper planes floating down from the gods this afternoon. Instead, the sun-kissed stadium hummed with a nervous excitement in those pregnant few moments prior to kick-off. On a Wembley atmosphere scale it was decidedly more NFL than Tottenham Hotspur at home. The players strolled out for the national anthems to rapturous applause and the sight of thousands of fluttering flags, and it felt more like the Last Night of the Proms than yet another meaningless international.

England vs Croatia player ratings Show all 14 1 /14 England vs Croatia player ratings England vs Croatia player ratings Jordan Pickford 6 - Croatia didn’t test Pickford on many occasions, though the goalkeeper was fortunate that Rebic failed to capitalise on an early error. Fine otherwise. AP England vs Croatia player ratings Kyle Walker 6 - Combined well with Raheem Sterling down the right, being allowed to get forward often. Getty Images England vs Croatia player ratings Joe Gomez 7 - Walker’s forward freedom often left Gomez a little isolated, but the Liverpool defender responded brilliantly, coping with Ivan Perisic impressively. An emerging force, and his range of passing is strong. REUTERS England vs Croatia player ratings John Stones 6 - Not as eye-catching or involved as his centre-back partner, but still managed to play a number of good passes. REUTERS England vs Croatia player ratings Ben Chilwell 7 - Another accomplished showing. His delivery into the box was hit-and-miss, but his ball for the winner was excellent. Getty Images England vs Croatia player ratings Eric Dier 6 - A positive performance from Dier, who slipped between Stones and Gomez when in possession and played similarly potent diagonals. One error at 1-0 that could have cost England, but did his job effectively. AFP/Getty Images England vs Croatia player ratings Fabian Delph 8 - Gave the midfield balance as a left-footed, left-sided player, and combined nicely with Rashford in the second half. AFP/Getty Images England vs Croatia player ratings Ross Barkley 6 - Growing into his role in this England team. Worked hard, used the ball nicely and kept the team ticking. Action Images via Reuters England vs Croatia player ratings Marcus Rashford 7 - If Sterling was the player of the first half, Rashford was the player of the second. Though substituted before both goals, he tormented Tin Jedvaj and the rest of Croatia’s right-side, producing several magnificent forward surges. AFP/Getty Images England vs Croatia player ratings Raheem Sterling 7 - Outstanding in the first half, a constant menace in behind and combining well with Kane. Faded as the game wore on, but still looked a threat with his pace. EPA England vs Croatia player ratings Harry Kane 8 - A goal and an assist from the captain to mark a strong all-round performance. Worried the Croatian defence throughout, and will be glad to break his goalscoring drought. EPA England vs Croatia player ratings Dele Alli 6 - Alli was on the longest of the England substitutes but might have been the quietest of the trio to come on. Gave England another body to throw forward. Getty Images England vs Croatia player ratings Jadon Sancho 6 - A couple more glimpses of his considerable talent in an enterprising 20 minute cameo. Action Images via Reuters England vs Croatia player ratings Jesse Lingard 7 - Lingard helped spark England’s comeback and popped up at the right time to score the simplest of tap-ins and equalise. AFP/Getty Images

And, in the end, the decidedly youthful crowd got the rousing crescendo they deserved. Not without a customary wobble, of course. Croatia looked to have pinched an utterly undeserved victory after a slipping and sliding Andrej Kramarić somehow retained his balance to skilfully loop his shot home. Cue a late comeback that was as ultimately unexpected as it was thrilling.

First Jesse Lingard levelled the score. Then Harry Kane scraped home the winner. Finally, the full-time whistle blew. As England celebrated the stadium announcer could not resist blaring out the now infamous Three Lions — the song which supposedly single-handedly fired Croatia to the World Cup final.

For the second time in just five months then, England are through to the semi-finals of an international tournament. Perhaps more importantly: the nation’s rekindled love affair with this affable young team continues unabated.

Kane was named Man of the Match of course. His 20th international goal in just 35 appearances. But it is Southgate who is behind not only England’s Nations League success, but also their wider revival. Unlike the vast majority of his fellow young cosmopolitan coaches, he is not ideologically wedded to any one system or formation. Instead, he has over these past few months proven himself to be tactically flexible, always willing to adopt or discard starting line-ups and strategies dependent on the occasion, the opposition and the players he has available to him.

Gareth Southgate saluted the Wembley crowd (AFP/Getty Images)

That takes guts. Especially considering the Kafkaesque management structure in place at The FA, where tactical continuity is seen as hard evidence that a wider ideological transformation is in place.

It was the same here. Against the United States, Southgate exhibited a new 4-3-3, afterwards claiming that the stylish 3-0 victory was — in spite of a geriatric Wayne Rooney — “a glimpse of the future”. He was bold enough to stick with that new formation and although the goals would come at the end of a frantic second-half, the intelligence of that decision was most obvious much earlier on.

In an inexplicably goalless opening half England were outstanding: repeatedly threatening from out wide, creating several goal-scoring opportunities and, perhaps most impressively of all, stifling that famous Croatian high-press.

It is one of the game’s great misconceptions that all it takes to press effectively is ten committed players and twenty bottomless lungs. Those things might help, but a good team press is also an exercise in communication and co-ordination: a meticulously rehearsed kaleidoscope of movement to rival anything seen in the synchronised swimming pool. Croatia are masters of it.

And yet here were England hassling and harrying them into mistakes, dominating possession and springing forward. Croatia weren’t just beaten. They were outplayed.

It was over a candlelit dinner in an expensive restaurant on the Black Sea that Southgate and Steve Holland first decided to roll the dice and play an unfamiliar 3-2-2-2 formation in Russia. But football doesn’t stand still. The emergence of a new crop of young players meant another change was necessary, and over the past week England have flourished in a variation of the 4-3-3 that both Roy Hodgson and — briefly — Sam Allardyce experimented with.