Asda workers have voted to go on strike in Wealdstone over a series of alleged workplace issues.
Half of the 52 staff at the Wealdstone branch, in the High Street, will take part in the vote between April 26 and May 17.
The GMB union alleges workers are angry at a series of issues including cuts in hours, poor quality training, bullying management, unaddressed health and safety issues not being addressed, fire safety breaches and equal pay not resolved quickly enough.
They also claim the supermarket is not engaging in collective bargaining with GMB.
Asda said no grievances have been raised at the store by colleagues regarding the issues GMB cites.
Wealdstone is the fifth Asda store to become embroiled in industrial action after workers in Gosport and Wisbech walked out in recent weeks and staff at Brighton Holingbury and Lowestoft voting to strike.
Keith Dixon, GMB regional organiser, said: "Asda Wealdstone – along with stores across the UK – is falling apart.
"Bosses are stripping the supermarket to the bones and workers are paying the inevitable price.
"There are thousands of health and safety breaches, including blocked fire exits, fire routes, and fire extinguishers, along with faulty fire alarm systems.
"Meanwhile an estimated eight million worker hours have been cut across Asda stores, so things are only going to get worse.
"Enough is enough – Asda workers in Wealdstone are making their voices heard."
An Asda spokesperson said: "We have established processes in place for colleagues to raise any issues or concerns they may have and we have not received any formal complaints at the Wealdstone store relating to the claims made by the GMB.
"Providing a safe working environment is of paramount importance to us and if colleagues have any safety-related concerns we would ask these are brought to the attention of a manager immediately so they can be investigated and promptly resolved."
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