Local services will no longer be affected on 6th - 9th April
The High Court has granted an injunction in favour of Network Rail and the proposed industrial action by Network Rail signallers on 6 - 9 April will not now take place.
The order came after a QC representing Network Rail said that "unlawful" strike action would cause "immense damage to the economy".
Bob Crow, general secretary of the RMT union, said: "This judgment is an attack on the whole trade union movement and twists the anti-union laws even further in favour of the bosses.
"Our fight for safe working practices on Britain's railways goes on. Our executive will meet this evening with a recommendation for a re-ballot."
Robin Gisby, head of operations at Network Rail, said: "This is good news for the millions of passengers who rely on us every day, for our freight users and for the country.
"A dispute with the unions remains, however, and we have a responsibility to our people to continue talking to the unions to find a settlement that works for us all."
The row between Network Rail and the RMT was over plans to cut 1,500 maintenance jobs and change working practices to allow more work to be done in the evenings and weekends.
South West Trains and Southern Train (West London Line) services will now operate as normal on these days.
April 1, 2010