London Bridge has been closed to traffic amid a series of black cab protests against TfL and Uber.
City of London police warned the demonstration would see the bridge sealed off until at least 8pm.
Buses serving London Bridge are expected to be diverted or terminate earlier than originally scheduled.
Officials said bus passes for London Bridge would be accepted on the Underground between Zones 1 and 2. London Bridge rail services are expected to be affected.
Remember folks, there’s a planned protest at #LondonBridge today. It’ll soon be closed to road traffic through to 8pm, which means there’s a group of roads nearby also shut.— City of London Police (@CityPolice) January 18, 2018
Please plan an alternative route!
Here’s your full details of closures ➡️ https://t.co/mafoWTvgFo pic.twitter.com/6Y3ekkIheV
The protest, in response to TfL's reasons for revoking Uber’s licence and the minicab firm’s continued operation in London, is the fourth to take place in the capital this week.
On Monday afternoon the busy Elephant and Castle roundabout was brought to a standstill by black cabs, causing traffic chaos in the surrounding area.
A TfL spokesman said: "The law stipulates that operators can continue until any appeals process is exhausted.
“We urge the organisers to call the protests off."