Commuters at Paddington station faced disruption owing to the London tube strike even though the Elizabeth line was still running. Photograph: Lee Thomas View image in fullscreen Commuters at Paddington station faced disruption owing to the London tube strike even though the Elizabeth line was still running. Photograph: Lee Thomas London tube strike causes huge disruption, with many services hit About half of London Underground drivers take action on Tuesday, with second strike scheduled for Thursday A 24-hour strike by London Underground drivers has begun, causing huge disruption to Tube services and roads. About half of Londonโs tube drivers have taken action, bringing widespread transport disruption to the capital. A second strike is planned for Thursday. Hopes of a resolution were high after previous threatened action was suspended in May . However, despite 11th-hour negotiations at Acas between RMT union representatives and Transport for London (TfL), RMT drivers planned industrial action on Tuesday and Thursday in a dispute over the introduction of a four-day working week. TfL urged customers to check before travel, with about half of all Tube services expected to run. On Tuesday morning, TfL reported severe delays on the Bakerloo, District, Hammersmith and City, Victoria, Piccadilly and Northern lines. No service was expected on the Circle line, the Waterloo and City line, the Metropolitan line between Baker Street and Aldgate, and the Central line between White City and Liverpool Street. Drivers in the Aslef union, a slight majority of those working on the tube, have welcomed the four-day week proposals and will not be on strike, limiting the impact of the RMTโs action. Other rail services, including the Elizabeth line, the London Overground and the Docklands Light Railway, were running as normal. Buses were operating as usual but were very busy and slowed by additional traffic on the roads. The RMT blamed TfLโs โrefusal to engage meaningfullyโ with concerns over the proposed working patterns. A spokesperson said: โDespite our best efforts in Acas talks, TfL have failed to provide assurances on our membersโ deeply held concerns around fatigue, reduced flexibility, shift lengths and the impact these proposals could have in a safety-critical role like tube driving. โWe remain available for meaningful talks, but strike action tomorrow will now go ahead.โ A TfL spokesperson said: โIt is bitterly disappointing that despite five hours of meetings with the RMT at Acas and repeated assurances that the four-day working week proposals will remain voluntary, RMT has chosen to continue with its disruptive strike action. We will do all we can to provide as much service as possible during this action.โ TfLโs chief operating officer, Claire Mann, said: โOur proposals are, and have always been, clear. The completely voluntary four-day week has been designed to improve work-life balance and any of our tube drivers who do not wish to take up the new propos