Civil service workers were celebrating last week after a High Court judge made a final ruling against the government’s attempt to reduce their redundancy rights.
Mr Justice Sales said that the workers’ PCS union was right to challenge the way that the terms of the civil service compensation scheme were changed.
PCS members struck for three days against the plans in March.
This led to a legal challenge that was heard in April and ruled in the PCS’s favour in May.
Sales’ decision overrules an amendment to the scheme that the then Labour government had claimed was effective from 1 April.
It was a key part of its plan to make major job cuts after the election.
The Tory-Lib Dem coalition will now have to negotiate with the PCS if it wants to change the scheme.
The judge also retained elements relating to protection against age discrimination that provide improvements to the scheme.
Delegates to the PCS conference recently voted to return to action if the new government presses ahead with the attacks.
The PCS also held protests around the country on Tuesday of this week against the government’s plans to cut public spending and impose a wage freeze.