Most players will kick-off their World Cup preparations on Monday, although Manchester United and Chelsea players will get time off after the FA Cup final - just as those involved in Liverpool's Champions League final will.
And his club team-mate Adam Lallana is another who only makes the standby list following an injury-stricken season, leaving only a few inventive midfielders.
"It is a young group, but with some really important senior players, so I feel the balance of the squad is good, both in terms of its experience, its character and also the positional balance".
For Arsenal midfielder Jack Wilshere, there was frustration as he was left out of the squad, but he took the snub in his stride.
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Speaking to talkSPORT host Jim White, Lineker said: "When you look at the squad there are some brilliant young players there and with a little bit of patience and a little bit of nurture, they could be superstars".
He said: "I found out when the squad was announced on Teletext, that's how old I am". You know, what we do is, if there are a couple of performances that don't go well, we all attack the players, the team, the system and the manager... It's probably capped off a really good season for me. Come the next World Cup or even the next European Championships, I think England will be very competitive.
But the most striking inclusion is uncapped teenager Alexander-Arnold. "When we pick young players, it's not just because they are young, it's because their performances deserve it", Southgate told The Guardian.
"I think people will buy that because in four years' time we are going to be a serious force in world football". Rashford wrote on Instagram: "After years of you standing on the touchline in the cold and rain, Mum we're off to the World Cup!".
Everton man Pickford and Stoke City's Butland are expected to battle it out for a start in the opening group game against Tunisia, although Heaton says the race is wide open.