Iceland was facing more disruption to Christmas trading this week with contractors for the retailer and trade unions failing to reach an agreement over pay.

Last week, workers at Iceland's DHL Exel-run Enfield depot took industrial action, having a rejected an offer of a 2.4% pay rise. A second 24-hour strike was due to take place yesterday (Friday).

Attempts by Iceland to keep stores in the south east full by stockpiling products were threatening food safety, claimed Peter Kavanagh of the T&G.

But Iceland insisted correct temperature controls were always in place.

A 48-hour strike is due to begin next Friday.