Commuters and other rail passengers around the country have faced travel misery amid strikes bringing down the entire London Underground networks and many train routes.
In London, Tube services were halted on Wednesday night at 18:30 BST and will not resume until Friday morning in a dispute between staff and management over pay and conditions.
The strikes are a coordinated action between the Rail, Maritime and Transport (RMT) union, the Transport Salaried Staffs Association (TSSA), Unite and the train drivers’ union Aslef, and include around 20,000 Tube workers.
Transport for London (TfL) have laid on additional river services and an extra 200 buses, but people have been urged to travel outside peak times or walk or cycle to their destination if possible to avoid long queues.
London Overground, DLR, and TfL Rail and tram services are unaffected by the industrial action.
Elsewhere, a walkout by First Great Western staff has meant that the rail operator has had to cancel half the high-speed services between London, Wales, and the West of England.
Travellers have taken to social media to vent their frustration and share images of the size of the queues:
— Ryan Hunter (@RyanHunterUK) July 9, 2015
— Aaron John Bastani (@AaronBastani) July 8, 2015
— HuffPost UK (@HuffPostUK) July 9, 2015
— BBC News (UK) (@BBCNews) July 9, 2015