Thanks alot for that James - but it does'nt do us much good if the river really overflows. If that happened all the tubes would be out and most of Southwark would be under water!
This is the first time I can remember it happening since I started working in the area in 1974.
This is an excerpt from the Environment Agency site regarding the Thames barrier -
The Flood Threat
"There was last night the greatest tide that was ever was remembered in England to have been in this River all Whitehall having been drowned"
Thus wrote Samuel Pepys in his diary on 7th December 1663.