We're in deepest Hackney, East London, minutes from the area's notorious "murder mile", at pub chucking-out time on a Saturday night. Unlikely as it might seem, Garber is about to take to the streets of the country's fifth most deprived borough with a team of devout Christians in baseball caps to fight local crime.

What's more surprising is that, according to police statistics, success is on their side. If you live in an urban area and haven't already come across the "Street Pastors", chances are that you soon will.