We're all under suspicion now.

The Manor Community College in Cambridge is to ban any visitor who has not been checked by the Criminal Records Bureau. evidently this is deemed necessary to prevent strangers walking around the premises. But the college admits that volunteers, visitors and contractors will be hit with the ban.

Also, more than 125,000 teenagers are now having their backgrounds checked each year, even if they just help younger pupils at school or volunteer as sports coaches...See here.

Now, school visitors and volunteers can simply refuse to have the check but contractors would lose work so could not. Scary.