Strikes by London Underground workers which would have crippled Tube services this week have been suspended, the RMT union has announced.
Little or no service was expected across the capital's entire network from Sunday evening to Friday morning.
Members of the Rail, Maritime and Transport union had previously voted to take industrial action over a below-inflation pay increase of 5%.
The union said "positive discussions" meant further talks could take place.
The 5% offer was described by Transport for London (TfL) as "the most we can afford".
But it said an "intervention" by London's mayor had allowed pay talks to be reopened.
Some disruption on the Tube is still expected though due to the strikes being called off late on, TfL said.
The RMT's general secretary Mick Lynch said: "Following further positive discussions today, the negotiations on a pay deal for our London Underground members can now take place on an improved basis and mandate with significant further funding for a settlement being made available."
He described it as a "significantly improved funding position" which meant scheduled strike action would be suspended "with immediate effect".
"We look forward to getting in to urgent negotiations with TfL in order to develop a suitable agreement and resolution to the dispute," he added.
London Mayor Sadiq Khan said he was "delighted" the industrial action had been called off.