Transport for London has revealed the 80 routes that will be disrupted due to a driver strike this week.
Bus drivers are due to go on strike over the wage cuts of £2,500 per driver.
The striking drivers are employed by three bus companies owned by French multinational RATP Group.
They operate routes in south, west and north-west London under contracts with TfL.
Some drivers say they have been offered a pay rise of 7p, which they don't consider to be enough.
There is further strike action planned for Wednesday 17, Wednesday 24 and Wednesday 31 March.
All three RATP Dev London subsidiaries – London United, Quality Line and London Sovereign - are expected to take part in the strike action on each of these three dates.
This will affect bus customers in west, north west and south west London, as well as parts of Hertfordshire and Surrey.
If the strikes go ahead, around 80 bus routes would be affected:
- The London Sovereign routes that would be affected are: 79, 142, 183, 251, 258, 288, 303, 326, 395, 398, 642, N5, H9, H10, H11, H12, H14, H17, H18 and H19
- The London United route that would be affected are: 18, 33, 65, 70, 71, 72, 85, 94, 110, 111, 116, 148, 203, 216, 220, 223, 224, 265, 266, 281, 283, 371, 406, 411, 418, 419, 423, 440, 613, 662, 665, 671, 681, 696, 697, 465, N18, N33, N65, N266, C1, H22, H32, H37, H98, K1, K2, K3, K4, K5 and S3
- The Quality Line routes that would be affected are: 293, 404, 413, 463, 467, 470, 633 and S1
It would affect these services from 00:00 each Wednesday, with services expected to be back to normal by 06:00 on the Thursday following each of the planned strike dates.
TfL said it will ensure as many bus services run as possible but bus customers in west London, north west London, south west London and parts of Hertfordshire and Surrey are advised to check before they travel, leave extra time for their journey, and where possible, consider alternative transport.
Geoff Hobbs, TfL’s director of public transport service planning, said: "We will do everything possible to reduce the disruption if this strike action goes ahead, but customers who need to travel should again check before they travel and allow more time for their journeys.
"We urge RATP Dev London and Unite the union to resolve the issue as soon as possible."
Bus services run by other operators are expected to run as normal on these three dates, and customers using these services as an alternative to their usual route can take advantage of the Hopper fare, which allows unlimited journeys within the hour for the price of a single fare. Other modes on TfL’s network will continue to run.
London Underground and London Tram services will operate as normal.
There will be a reduced service on London Overground between Stratford and Richmond /Clapham Junction.
TfL is doing all it can to minimise the disruption, including contacting all registered customers of the affected routes and engaging with the schools affected by the industrial action.
Countdown signs and posters at bus stops and in stations will also warn of potential disruption.
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