Fears over the long-term stability of Big Ben have been raised because it is beginning to tilt to one side.
The top of the clock tower is leaning one-and-a-half feet off a level position, according to surveyors, and getting worse each year.
The tower in Westminster, which houses the giant bell known as Big Ben, is sinking into the banks of the Thames, partly as a result of decades of underground excavation.
Subterranean works beneath the tower include the Jubilee line station, an underground car park and sewers.
Its lurch of 0.26 degrees is said to be visible to the naked eye – and if it goes uncorrected could cause the tower to crash.
However at current rates, it would take 4,000 years before the tower is as slanted as the Leaning Tower of Pisa which leans by four degrees and is around 12ft off the vertical.
by The Punjapit Alliance