The GMB union has criticised Tesco for its failure to address a collective grievance submitted by 16 workers at a West London store, several months after it was formally raised.
The grievance, submitted in April, outlines serious allegations of bullying by a manager at the company’s Yeading branch. The claims span a period of two years.
Despite the gravity of the complaint, Tesco has yet to fully investigate the matter or provide an official outcome. GMB recently learned that the staff member originally appointed to hear the grievance is no longer employed by the company — a development that came after weeks of silence.
The union has now requested a written response within five working days, citing both ACAS guidance, which states that grievances should be handled “without unreasonable delay,” and Tesco’s own grievance policy, which promises to conclude investigations “within a reasonable timeframe.”
Reports from GMB members claim that the manager at the centre of the allegations has resumed inappropriate behaviour and is now allegedly targeting individuals believed to have supported the grievance — further intensifying calls for a prompt resolution.
Trevlyn McLeod, GMB Regional Organiser, said:
“It took enormous courage for our members to raise a grievance, and Tesco’s silence in return has been shameful.
This isn’t just a delay — it’s a failure of basic process.
Tesco’s failure to act on these bullying allegations risks undermining staff confidence that their concerns will be heard and treated seriously.”