A bank holiday rail strike has been called off after unions received a “revised” offer from Network Rail.
The announcement comes as thousands of signallers, maintenance staff and station workers were due to walk out for 24 hours from 17:00 on Monday in a row over pay and jobs.
The RMT and TSSA unions had been involved in talks for four days with Network Rail at conciliation service Acas.
RMT general secretary Mick Cash said: "Following the Acas talks, RMT has received a revised offer that enables us to suspend the planned industrial action while we consult in full with our Network Rail representatives."
Manuel Cortes, general secretary of the TSSA, said: "Our negotiating team at Acas has received a revised offer from Network Rail.
"As a result of this, they have suspended the planned industrial action, pending the outcome of a meeting of our workplace representatives next week."
Cancellations and revised services were expected across a wide range of operators including Virgin Trains, Heathrow Express and Southeastern.