London bus workers today announced two 24-hour strikes in a row over rosters, including on Bank Holiday Monday when the Notting Hill Carnival takes place.
Members of Unite at bus operator Tower Transit will walk out on Friday and again on Monday after voting by 9-1 to back action.
Unite said around 1,000 drivers, engineers and other workers are involved in the dispute - affecting 28 routes in the capital.
Regional officer Simon McCartney said: "Tower Transit bus workers have reached breaking point over an increasingly belligerent management who have turned their back on constructive consultation and dialogue.
"Instead workers now face the imposition of changes to their rosters leaving them out of pocket and rearranging their family life.
"To add insult to injury, bus workers have also found themselves short changed when doing overtime on a rest day.
"Our members take great pride in keeping London on the move 24 hours a day and deserve better."
Mike Weston, Transport for London's director of buses, said: "I'm sorry that some of our customers may face disruption to their usual routes.
"I would advise everyone to check our website for the latest updates and we'll be working hard to ensure that customers have up to the minute information about which services are affected.
"We're also encouraging Tower Transit and Unite to resolve the dispute as quickly as possible to avoid disruption to passengers' journeys."
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