London Commuters Warned of Transport Misery If Strike Goes Ahead

People, some wearing protective face masks, walk along a platform at Oxford Circus underground station, amid the COVID-19 pandemic, in London, on July 4, 2021. Henry Nicholls/Reuters

LONDON—London’s transport operator warned customers on Thursday that strike action next week may go ahead causing disruption across the underground network.

The walkout is planned between Aug. 24 and Aug. 27 and would mean a significantly reduced service on all lines for most of the week, and that journeys may need to be completed early, Transport for London said.