Travellers in London told to avoid tube on Monday as 4,000 station staff strike

TfL warns of severe disruption, while union sources call for entire network to be shut down over safety concerns

London's transport operator has warned people to expect severe disruption" on the tube on Monday when 4,000 station staff are due to walk out in a 24-hour strike that will shut down much of the network.

Transport for London said there would be problems across all lines from the start of service on Monday to 8am on Tuesday, with a limited number of stations open. It advised against travel on the tube throughout that period unless necessary".