Tesco workers are to walk out on Valentine’s Day in an all out strike.
The Mandate trade union said 78 per cent of its 10,000 members voted for the action, which will affect nine stores in Ireland.
The strike will continue indefinitely and could hit a further 15 stores when more ballots are completed, the union said.
The dispute centres on changes to employment contracts affecting about 250 workers hired before 1996.
Mandate claimed that some workers will see their pay cut by up to 15 per cent while being obliged to work more flexible hours.