Pilgrim’s Food Masters makes chilled and frozen meals, announced up to 260 redundancies at the company’s site in Dean Way, Southall.
Pilgrim's will now enter a statutory 45-day consultation with staff.
Up to 1,000 Pilgrim's workers were faced with fire and rehire at one of the company’s other London factories – but after pressure from GMB members bosses withdrew the threat.
Gavin Davies, GMB Senior Organiser, said:
"GMB has serious concerns about how this will impact on our members and the local community with the job losses.
“With the previous closure of Colette Way, a further closure to Dean Way has come as a massive blow to our members.
“GMB will fight tooth and nail for workers to be paid every penny they are due.”
