A police inquiry has cleared an ambulance trust of allegations that a tape of a 999 call was tampered with.

Forensic examiners sent into Greater Manchester Ambulance Service trust's control room found 'no evidence' that the recording of the call to heart attack victim Billy Roache of Wigan had been 'interfered with in any way'. Mr Roache's widow, Pamela, claimed that an ambulance took 40 minutes to reach him last September.

The inquiry results came as ambulance trust chief executive Adrian Lucas announced he is to become chief executive of the Scottish ambulance service.