Neighbourhood Watch, is one of the biggest and most successful crime prevention schemes ever. At its most basic level, it is a system where a group of neighbours get together with the police and other agencies to reduce local crime and disorder (and perceptions of crime) in the bid to make your neighbourhood a safe and better place to live, work and play.
It's also about building community spirit and good relations. In London, we have expanded the reach to include the whole community, members of watches included.