HS2 high speed railway trains could be made to run slower than initially planned to keep costs down.

The government is to order the company building the project to consider lower speeds on the line from London to Birmingham, which has been hit by delays and cost overruns.

HS2's chief executive Mark Wild was expected to say this month the line would not be completed until after the current 2033 deadline and it would cost over £100bn in today's prices, but that announcement has now been delayed until after the May elections.

Transport Secretary Heidi Alexander is said to be weighing up all options to claw back as much time and money for the taxpayer as possible.

Among the options is a lower initial operating speed on the line.

HS2 has been designed to allow trains to run at up to 360km/h (224mph). Department for Transport sources point out that this is faster than any other conventional railway in the world.

Most high speed trains in this country run at up to 200km/h (125mph), while those on the Channel Tunnel Rail Link (HS1) operate at up to 300km/h.

This means HS2 trains could not be tested at their intended operating speeds until a bespoke test track, or the railway itself is complete, something DfT sources claim would delay completion of the project by several years and cost billions of pounds.

The alternative, they say, would be to send trains to China to be tested on existing tracks there.

The government has been highly critical of decisions taken by previous administrations. Last year, the Transport Secretary described the scheme as "an appalling mess".

The Conservatives have been approached for comment.

Wild, who had previously worked as chief executive of Crossrail, the project that became London's Elizabeth Line, was brought in by Labour to overhaul the scheme.

Wild has spent more than a year working on a "reset" of the entire project which is meant to set out a realistic schedule and budget for delivering the line.

A number of major developments, including tunnels and bridges, have been built along the line but it is still years away from completion.

HS2 was originally envisaged as a high-speed railway that would connect London with Leeds and Manchester. However, the sections north of Birmingham were subsequently cancelled.

Under current plans, HS2 trains will travel from Birmingham to Manchester, but at reduced speed on the existing West Coast Main Line.

Train operator says a "limited" number of buses were laid on after the line was blocked.

Pokesdown station is to receive £2.6m from the government to part-fund the project.

In the film, the comedian is seen taking part in risky behaviour at railway stations.

The DLR station has had four escalators installed along with a new lift and a fire detection system.

About 30 passengers and railway staff are helped by crews after the fire on the GWR carriage.