I'm certain that top flight teams look down lower league starting line-ups looking for teenagers and take it from there! Top scouting technique.
They look for big lads with a bit of pace....the abilty to kick the ball properly is an advantage.
I think it was King, who told Iffy, that our youth system always seemed to produce midgets...think Chris Taylor, Alan Young, so get some big lads in. Iffy got Lukey Dukey, then Byrne carried on the idea with Tozer and Morrison