I am wondering. If you go to ECB tryouts and your son is picked by a coach that you really don't want to play for you can turn him down, right? What happens to the player, can another ECB coach then make an offer?
You never have to play for a coach for whom you don't want to play. Turning down one coach, does not prevent you from be selected by another coach.
UNLESS the initial offering coach has someone put word out he's 'got you', thus making you off limits, for other ECB coach's to offer. May be worth letting the coach of the team you want, know that you're still available and haven't accepted any offers.