Hundreds of people packed King's Lynn train station this morning to catch a glimpse of a hissing mechincal marvel before it headed to London.

The Gresley Pacific Sir Nigel Gresley 60007 locomotive sent plumes of steam into the sky after roaring into life just after 10am and chugging its way out of the station.

Crowds of people then took up a position at various crossing points to wave at the 300 passengers on board as train glided through Downham Market, Ely and Cambridge.

On leaving Cambridge, the steam train joined the East Coast Main Line at Hitchin and was expected to arrive at London King's Cross just before 1pm.

The steam train will leave the London train station at 6.33pm tonight to return to Norfolk.

The train is scheduled to return to Cambridge at 7.41pm before pulling in at Downham Market at 8.20pm, Watlington at 8.28pm and finally King's Lynn at 8.44pm.

The Sir Nigel Gresley locomotive was built in 1937 by the London and North Eastern Railway and is named after its designer.

It was based mainly in London working express trains to the North East of England and Scotland.

In 1959 it set the official post war speed record for steam of 112mph.