London Underground workers are now expected to call off their strike, saving commuters from two days of misery.
The 48 hour strike was planned to start on Monday, April 28, just two days before the London Mayoral elections.
The Rail Maritime and Transport (RMT) union called the industrial action because of concerns over the collapsed maintenance company Metronet.
But the union has said substantial progress was made last night over its demands for guarantees about conditions and pension arrangements when Metronet workers transfer to Transport for London (TfL).
The union's general secretary Bob Crow said: "We now have in writing undertakings that when the Metronet contracts are taken back in-house by TfL there will be no outsourcing and all Metronet staff will be entitled to join the TfL pension fund and enjoy the same travel facilities as other TfL employees."
He said on the basis of the new developments he would recommend the dispute be ended.
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