The Manchester City player is heading to Russian Federation, the reports claim.
"To put himself on the global stage, he is known all around Europe obviously, but to put himself on a world stage he has to go out and perform and score goals in this tournament".
"What is Joe Hart going to learn from going to this World Cup?". Whereas a young kid.
"Maybe there are other players a bit older playing in the league who might be better now or more experienced, but we don't think we could win a World Cup with them in future and would rather invest time and show belief in young players we think could be world class".
"When I went to the next World Cup and played in 2002, I didn't have anything I needed to learn, I wasn't apprehensive about things".
Swansea defender Alfie Mawson will also not be included in the England World Cup squad after he underwent successful knee surgery on Monday, keeping him out for between six weeks and two months.
The Guardian add that Gary Cahill, Jermain Defoe, Ryan Bertrand and Chris Smalling will miss out.
The squad will be drawn from the privately-submitted long list of 35 handed to Federation Internationale de Football Association and, while the world governing body does not need it whittled down until June 4, Southgate will name to 23 to strip unnecessary anxiety and pressure from preparations.