Staff at the Bank of England will strike tomorrow for the first time in more than 50 years.
The central bank's maintenance, hospitality and security staff are staging a three-day walkout over their most recent pay review.
The Bank of England held talks with union Unite today via the conciliation service Acas, but talks broke down and staff will protest on Threadneedle Street tomorrow morning.
Unite has accused the Bank of giving staff "derisory" pay rises which are not in line with inflation, and has said up to a third of staff will get no pay rise this year.
The Bank said Unite had balloted two per cent of its workforce over the strike action.
A Bank of England spokesperson said:
The Bank has plans in place so that all essential business will continue to operate as normal during this period. The Bank has been in talks with Unite up to and including today and remains ready to continue those talks at any time.
Unite London regional secretary Peter Kavanagh said: "Mark Carney should come to the picket lines outside this iconic British bank today and explain why hardworking men and women deserve to face years of pay cuts."