Tower Bridge unveils glass walkway above River Thames Published duration 10 November 2014

image copyright PA image caption Visitors will be able to test their head for heights

A glass walkway which gives visitors a bird's eye view of traffic has been unveiled at London's Tower Bridge.

Tourists can test their head for heights by venturing on to the structure which soars 42m (138ft) above the Thames.

The £1m walkway is 11m long and gives visitors a unique viewpoint of the world-famous bridge lifting, as well as the traffic and boats below.

The West Walkway was unveiled with the East Walkway opening next month.

media caption Speeded up footage of London's Tower Bridge

image copyright Aneela Rose PR image caption Tower Bridge was opened in 1894 and is celebrating its 120th anniversary this year

Christopher Earlie, the business and marketing manager from the bridge, said: "The opening of Tower Bridge marked the dawn of a legendary feat of engineering creating what is considered by many as the most famous bridge in the world.

image copyright PA image caption The walkway provides an aerial view of pedestrians and road users

image copyright PA image caption The bridge opens 1,000 times every year for vessels, ships, sailing barges and cruises

"For the first time ever, visitors will be able to experience a never-seen-before viewpoint of London - the Thames, road and pedestrian life, all moving at pace 42 metres below."

image copyright PA image caption This is how the new walkways look from the water

This year marks Tower Bridge's 120th birthday, following its opening on 30 June 1894 by the Prince of Wales, who was later crowned King Edward VII.