A former cabinet minister has raised new fears about a flood risk from the government's controversial HS2 railway line.

Cheryl Gillan, the Conservative MP for Chesham & Amersham accused ministers of failing to carry out a risk assessment along the route.

She said: "This is totally unsatisfactory. You would have thought that was a basic part of any investigation".

Mrs Gillan, a former Secretary of State for Wales, said recent flooding in her constituency underlined the potential danger.

Sandbags are still in place outside properties in Old Amersham where the High Street was under water for several weeks.

The Elephant and Castle pub remains shut because the cellar is submerged , despite the efforts of the local fire brigade.

The flooding was caused by heavy rain, a saturated water table, overflowing drains and a blocked culvert.

A spokesman for HS2 said: "HS2 will be designed to remain operational during a one in 1,000 year flood event.

"Put simply, that means the railway is being built so that it can withstand just the sort of extreme weather that we have seen up and down the country recently."