Reuters and other news sources are reporting workers on the London Underground rail network (also known as the Tube) are planning to hold a two-day strike slated to begin Monday evening in a dispute over plans to cut jobs and close ticket offices.
Talks are reportedly ongoing between Transport for London (TfL) and the Rail, Maritime and Transport workers' union (RMT) in an effort to avoid the 48-hour walkout, due to begin at 8 p.m. local time, a spokesman for TfL said.
A similar strike in February brought the network, used by some three million people most days, to a virtual standstill.
The newswire says that British Prime Minister David Cameron has called the strike "unjustified and unacceptable," and said that it would hit millions of families and cause chaos for businesses.
Business lobbies, meanwhile, reportedly claimed that previous tube strikes cost London's economy up to 50 million pounds a day.
Another three-day strike has been called for May 5.