I tried to work out how many of England's starting 11 had come through an academy at one of the 'top 6', ( Man U, Man C, Chelski, Arsenal, Liverpool, or Spuds ), ie being at one of those clubs on their 16th birthday - I think the answer is none. Extending the analysis to the full match squad, I reckon there are 5, ( Kane and Mason at Spurs, Liverpool signed Sterling from QPR aged 15, Heaton was at Man Utd for a while, and Gibbs was about 15 when he joined Arsenal after Wimbledon disbanded ).
Glad to know that by comparison Saints developed 3 of them.