Could it be that rival brokers are jealous of Marsh's shiny new metal-and-glass monument to success overlooking the Tower of London?

Some wags would have us believe the new building has been hit by the curse of the Millennium Bridge.

Both were designed by Lord Foster and someone has been putting it about that Marsh & McLennan's new UK headquarters building has developed the same wobbly tendencies as the infamous footbridge.

Backchat's subsequent investigations found that giddy sensations were nothing new in the heart of London's insurance district, but were more often reported around lunchtime, by members of the broking fraternity other than the inhabitants of Tower Place.