POSTAL WORKERS have vowed to fight a “desperate and sinister move” by Royal Mail to invalidate a strike ballot overwhelmingly supported by postal workers.

Royal Mail bosses are seeking an injunction to block the planned strike, which could disrupt Christmas post as well as postal voting in the run-up to the general election.

The company sought an interim order in the High Court against the Communication Workers Union (CWU), claiming there are “potential irregularities in the ballot” making the vote unlawful.