London's Millennium Bridge is to shut for three weeks for urgent repairs - the second closure in its short history.
The pedestrian crossing - also known as the "wobbly" bridge - opened in June 2000, only to be shut two days later as users experienced a troubling sway in the structure as they crossed.
Engineers worked out how to stop the oscillation and it reopened in 2002.
Now, a layer of membrane has started to degrade and needs to be replaced.
The bridge across the River Thames linking St Paul's with the Tate Modern will close at 08:00 BST on Saturday 14 October and reopen on 5 November - or sooner if the work can be completed ahead of schedule.
Chairman of the City Bridge Foundation Giles Shilson said the work would be "a time-consuming process" and would continue around the clock, with noise limitations in place overnight.
He added: "We're sorry for any inconvenience but hope people will understand we do need to do this work, and will see the benefits after we give the bridge a much-needed deep clean that will leave it looking as good as new."
Diversion routes will be in place via Southwark Bridge and Blackfriars Bridge.
