More than 120 climate change activists have been arrested for blocking roads in central London, amid protests aimed at shutting down the capital.
A second day of disruption is under way after Extinction Rebellion campaigners camped overnight at Waterloo Bridge, Parliament Square and Oxford Circus.
Police said 500,000 people had been affected by the diversion of 55 bus routes in London.
The Met said 122 people had been arrested by 12:30 BST on Tuesday.
All remain in custody. Most were detained on suspicion of public order offences, while five people were held on suspicion of criminal damage at Shell’s HQ.
Campaigners have been ordered to restrict their protests to Marble Arch after they caused widespread disruption on Monday .
Ch Supt Colin Wingrove said: “Ongoing demonstrations are causing serious disruption to public transport, local businesses and Londoners who wish to go about their daily business.
“At this time we have made a total of 122 arrests… 117 were on Waterloo Bridge last night and in the early hours of this morning,” he added.
Motorists face gridlocked traffic on a number of alternative routes, such as Westminster Bridge and Blackfriars Bridge.
Transport for London warned bus users that routes would remain on diversion or terminate early.
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