seems such a simple question. went online to get the "real" answer. most common: after season closes to Aug 31st. but, not everyone agrees. hope that helps.
For what it's worth i think you can buy any player anytime you want.But he cannot play unless he is registered before the transfer windows close. I think ????
I asked a simple question so how come the answers so difficult the 1st july hope not seems a long way off no transfer centre on sky sports yet