Thought we had 4/5 E/U16’s, injuries or have they moved up? Or my memory fails me.
These are u15's rather than u16's
I think at both u15 and u16 the coaches try out a number of players, so there might be 2 or 3 different squads tried out ie maybe 50 or 75 in each age group - and u15 squads are called up for more training camps than formal matches.
But certainly from u17 onwards (and maybe later in the season u16 call ups) the squads are mainly of the same 20 odd players (allowing for injuries) with relatively few 'new' players joining each age group squad.