Network Rail staff will stage two walkouts in a row over pay and jobs starting next week.
The Rail, Maritime and Transport union has announced that staff will stage a 24-hour strike from 5pm on Thursday, June 4 and a further 48 hour walkout from 5pm on Tuesday, June 9.
A planned rail strike due to take place over the bank holiday had been suspended.
RMT General Secretary Mick Cash said: “Our representatives have rejected the pay package offered by Network Rail and in the absence of any further movement from the company that has left us with no option but to move to a rolling programme of industrial action which will begin next Thursday.”
RMT said there will be action short of a strike - including not working any overtime or additional hours - from midnight on Saturday, June 6 to midnight on Friday, June 12.