On Tuesday some Amazon workers have started industrial action and the GMB Union are to ballot other staff for strike action.
Amazon members of the union at the Coventry site are already on strike for three days and on Black Friday, 24 November there will be further industrial action.
Union members at Amazon’s Birmingham site are also to be balloted for industrial action over a pay dispute.
GMB official Rachel Fagan said: “Today more than 1,000 GMB members at Amazon will down tools and take to the picket line in the first day of strike action leading to Black Friday.
“This is an unprecedented and historic moment with low-paid workers taking on one of the world’s most powerful corporations.
“This action will bring the total days lost at Amazon to strike action to nearly 30.
“Now we’re seeing industrial action snowballing with workers launching a new strike vote at Amazon Birmingham.
“With a winter of strike chaos looming, it’s time for Amazon bosses to urgently listen to their workers.”
An Amazon spokesperson said: “We offer competitive pay, comprehensive benefits, opportunities for career growth, all while working in a safe, modern, work environment.
“At Amazon, these benefits and opportunities come with the job, as does the ability to communicate directly with the leadership of the company.”