Staff took previous strike action over pay and conditions

Members of the GMB at the firm's Wigan distribution centre look set to walk out in the week between Christmas and the New Year.

The union says the strike aimed to "secure implementation of the agreement that ended the first strike last month and to stop attacks on the union".

Workers also plan to protest outside Wigan's football matches, including a Manchester United game at Old Trafford.

JJB declined to comment on the planned action.

GMB members have held a series of strikes in a dispute over pay and conditions.