A policeman is facing the sack after he was caught on CCTV throwing a woman into a cell, badly injuring her.

The footage also shows Sgt Mark Andrews dragging Pamela Somerville across the floor of Melksham police station in Wiltshire.

Ms Somerville, now 59, was arrested in July 2008 after being found asleep in her car. Her treatment left her with facial injuries and needing hospital care.

Andrews has been convicted of causing the woman actual bodily harm and is expected to be dismissed from his job.

The BBC's Steve Brodie describes the scene after the woman was taken into the custody unit in 2008.