Around 100 workers at the warehouse will take strike action on Jan. 25, said GMB, which has not been formally recognised by the U.S. e-commerce giant.
A spokesperson for Amazon said the strike would cause "zero disruption" to customers and that 19 union members out of 2,000 employees at the warehouse had voted in favour of industrial action.
The company, which employs 75,000 people in Britain, added that it planned to raise minimum starting pay to 12.30-13 pounds ($16-$17) an hour by April.
Minimum wage in Britain is set to rise to 11.44 pounds an hour from April.
Over the past year, hundreds of employees have walked out during previous strikes at another Amazon warehouse, in Coventry, central England without much disruption to Amazon's operations.
"The message from GMB members at Amazon is the same; recognise our union and end poverty pay," GMB Organiser Rachel Fagan said.
($1 = 0.7855 pounds)
