London's underground rail network has ground to a halt as staff began a week of strikes over pay and working conditions, disrupting travel for commuters and tourists.

Almost no underground trains are expected to run until Thursday, so that people who take 3.7 million daily journeys on the "Tube" were either working from home or finding other ways to get around.

Forest, which operates 15,000 e-bikes in London, said it experienced four times its usual demand by 9am local time.

Other commuters switched to buses, or relied on the few other train lines that were working, with most reporting longer journeys.

"The prospect of it being all week, it's a bit of a nightmare," said legal counsel Laura Sutton, 46, who was near London Bridge station on Monday.

Transport for London, which operates t

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