The question should be "who CAN produce excellent British players?".
Utd obviously have a decent record, but their production line has slowed. West Ham have a good record and then............who?
Arsenal right now have more British talent coming through than anyone......Gibbs, Ramsey, Wilshire, Walcott, Eastmond, Watt, Bartley etc. Hopefully three or four of those names will actually make it big.