Alistair Darling has pledged a full investigation into Saturday's rail accident which left seven dead and dozens injured.

The transport secretary sent his condolences and pledged a full inquiry into the crash.

The accident occurred after the high speed London to Plymouth service struck a car at an unmanned level crossing.

The police believe the car driver, who was killed, may have been committing suicide.

"This is clearly a very serious accident and my deepest sympathies are with those involved and affected," said Darling.

The crash has led to fresh calls for unmanned level crossings to be scrapped.