The Transport for London website and app crashed on Monday morning as Londoners faced a nightmare trying to get to work.
People trying to clicking onto specific lines to find out more information about the impact of a five-day RMT walkout were greeted with an “internal service error” message.
“Please try again later,” it said.
TfL apologised to customers for the disruption, which was caused by higher than usual demand and explained its technical team was working to try and resolve the issues as soon as possible.
once a tube strike starts - dois it normally complete the full strike duration?
— A1_bloke (@a1_bloke) September 7, 2025
or do strikes sometimes get halted part way through?
btw, the TfL website (including journey planner) is down - presumably buckled under the strain? pic.twitter.com/u3dMIPGe0W
Social media users speculated that the website had “buckled under strain” as hundreds of thousands of Londoners pondered how to plot their way in to work - or whether to give up and stay at home.
The website appeared to be partially back up and running by 8.15am.
The strike action kicked off on Sunday with limited services running but levels of disruption are set to ramp up as Transport for London (TfL) warned there will be few or no services between Monday and Thursday.

No trains will be running before 8am and passengers are asked to complete their journeys by 6pm.
There will also be no Docklands Light Railway services on Tuesday and Thursday because of a strike by RMT members in a separate pay dispute.
A TfL spokesperson said: “We apologise to our customers for the current disruption affecting the Journey Planner website and the TfL Go app, due to higher than usual demand.
“We are aware that both services are currently experiencing issues, and we understand the inconvenience this may be causing to those planning their journeys across London. Our technical teams are working urgently to identify and resolve the problem as quickly as possible and we apologise again for any disruption caused.”