Asda is today expected to apply for an injunction to stop a proposed five-day strike at its distribution centres.

Last week, members of the GMB union at Asda's 20 distribution centres across the UK voted for a five-day strike in a long-running dispute over working conditions and union recognition. The strike is due to run from 00.01am on 30 June to 23.59pm on 4 July.

However, reports suggest that the supermarket group will go to the high court this afternoon in an attempt to block the strike. Its claim is based on allegations of major irregularities in the GMB union's strike ballot.

Meanwhile, a former Asda director has warned that a five-day strike could cost Asda a “seven-figure sum”.

He said: “Moving volume is less emotive than moving people, so Asda will direct stores to be serviced by different distribution centres. I think they will be reasonably confident about riding out the impact of the strike.”