A three-day strike by Bank of England workers will go ahead from Tuesday.
Staff in departments including maintenance and security will walk out in a dispute over pay, union Unite said.
The union blamed Bank of England governor Mark Carney for the failure of talks to resolve the issue.
Staff will don Carney masks during a protest outside the Bank's headquarters in the City of London on Tuesday.
Unite accused the Bank of imposing a "derisory" below inflation pay increase for the second year running.
Up to a third of staff will get no pay rise this year, the union said.