Union leaders are finalising plans for a demonstration by Marks & Spencer staff from across Europe in protest at store closures.
More than 1,000 workers from France, Belgium and other countries are expected to join the rally in London on May 17.
Union Network International (UNI), which represents 50 unions across Europe, is organising the demonstration.
"We want these closures stopped because we don't think they are well founded or in the interests of consumers," said UNI spokesman Jan Furstenborg.
Union officials will meet in London later this week to finalise plans for the demonstration.