The RMT union says it has uncovered close to 200 examples of Network Rail deferring essential track, they say in order to save costs.
The figures are so far incomplete, and the RMT say the final figure could top 1,000 examples.
RMT general secretary Bob Crow said: “Network Rail cannot seriously expect us to believe that this work is being deferred to take advantage of more efficient but unknown future methods of delivery when the jobs being cut had already been placed with contractors.
“If Network Rail had already decided that work should take place at these 200 locations in the coming year, what has changed?
“The simple fact is that Network Rail is under massive pressure to save money, but it is shocking that it is prepared to defer essential works on this scale and cut the frequency of track inspections and signals maintenance in order to do so.”
Crowe called on the Prime Minister to intervene to force the reinstatement of these deferred projects.
“Gordon Brown has said that it is committed to using investment in public works to help our economy ride out the recession, but unless he intervenes to reverse these cuts he will be allowing infrastructure safety standards to be undermined and subsidising redundancies instead.
“A good start to today’s debate would be to hear that the government is ordering the re-instatement of Network Rail’s full programme of planned renewals work and a reversal of cuts in maintenance regimes and inspections,” he said.
The RMT say that their list is incomplete, and while they await further updates from around the country, they expect the full number of deferred jobs to top 1,000.