Workers at one of two McCain Foods' plants hit by industrial action have voted to return to work.

Staff at the facility in Harnes, in northern France, who have been on strike since Sunday, have agreed to a pay offer from the company.

However, at McCain's plant in Matougues, which has been on strike since 27 November, industrial action continues.

"A new round of negotiations is planned with management for today and we are still demanding a 5% salary increase as wages at the Harnes plant are higher than for workers at Matougues," a union official said.

Workers at Harnes have negotiated a wage increase of 2.2% for 2012, management having offered a 1.6% rise with a further 0.6% based on merit. The improved offer also entails a modification in working conditions and a one-off gross bonus of EUR200.

A spokesperson for McCain said the company was looking for a swift settlement of the strike at Matougues "on the same terms as Harnes".

She insisted that the strikes had not affected McCain's supply of products. "Output has continued during industrial action at both the Matougues and Harnes plants and we have also been able to call on stocks from other plants."