Police are digging up the garden of a house in Bradninch, formerly occupied by a couple who're in prison for child sex offences.
David and Pauline Williams - who knew serial killers Fred and Rose West while living in Gloucester - were jailed last year for a string of child rapes, sex assaults and beatings.
Police say they're excavating the garden of their former home following a tip-off relating to historic intelligence on the address and its former occupants.
The operation is expected to take four days.