(Adds CWU response, details)
Nov 8 (Reuters) - Royal Mail Plc said on Friday it would apply for an interim order from the High Court to block a potential strike by its biggest union, the Communication Workers Union, saying it believed the strike ballot had been unlawful.
Royal Mail said it was worried by the potential for industrial action around the General Election on Dec. 12 and in the traditionally busy run-in to Christmas.
The CWU last month voted by 97% in favour of a nationwide strike, saying the company had failed to adhere to a pension deal agreed last year. Royal Mail said it had honoured the deal.
"Royal Mail have made an application to take us to the High Court. They claim there are irregularities with our ballot. We clearly refute this and will be represented. A hearing will possibly be on Tuesday," the CWU said in a tweet on Friday.sonos sonos One (Gen 2) - Voice Controlled Smart Speaker with Amazon Alexa Built-in - Black read more
The CWU, which has not said when it would hold the strike, on Monday rejected an offer that Royal Mail said was aimed at avoiding action that could affect mail deliveries ahead of the general election.
Royal Mail has told the union that if it removed the threat of strike action for the rest of 2019, the company would enter talks without preconditions. CWU in turn called Royal Mail's offer a "stunt" which the union would not fall for.
Royal Mail expects its application to be heard in the High Court in the week starting Nov. 11. (Reporting by Noor Zainab Hussain in Bengaluru; editing by Patrick Graham)
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