The police will be able to obtain a Community Protection Order. This could require a sex offender to desist from a particular activity which the police and courts regard as potentially dangerous - for example, hanging around areas where children congregate. The Home Office estimate that there are 110,000 child sex offenders in Britain. But only 40,000 of these operate outside the home and family. You may feel your children are in greater danger from a known or suspected paedophile, but they are more likely to be at risk from someone they already know.
Most paedophile advances are from people known to the children rather than from strangers.
Most abuse takes place within the family. From strangers From people they know. Contacts ChildLine is the UK's free national helpline for children and young people in trouble or danger. If you need help, if you want to talk to someone, call ChildLine free on 0800 1111. Kidscape is a charity devoted to teaching children how to avoid being abused in any way.