This is the moment an architect wrestles a group of moped thieves away from trying to take his £2,500 Brompton bike.
Ben Derbyshire, an architect who used to be president of the Royal Institute for British Architects (RIBA), was targeted by masked thieves wielding power tools outside a cafe in Hackney, East London.
The gang had tried to take his bike from its lock with angle grinders when Ben spotted the unsettling scene from inside the cafe.
