We do have a sex offenders register but we don't have felonies in the UK. As regards the public searchability of it - it's not exactly public information but might be disclosed to a potential employer, if relevant. So he wanted to become a teacher, it would be a problem but it wouldn't be disclosed to everyone who asked.
On the existance of a 'suspicion' registry - it's a tricky issue. Often people convicted of serious sexual offences leave a trail of prior allegations and suspicions behind them. It's tempting to take the position that until something is proved in court the only fair thing is to do nothing about it. I'm not sure that gets the balance right - you risk harm to innocent parties in either case, so there is no good solution. Obviously, this is over the top in this case - sadly police have got more process driven, and common sense has gone out of the window a bit.