Around 120 workers from the regulator in the capital will take to the picket line on Wednesday and Thursday, the first time staff have taken industrial action in its nine-year history.
Sharon Graham, Unite’s general secretary, said that “the imposition of changes to pay, terms and conditions at the FCA has left thousands of staff worse off”.
Staff are striking as they battle with the regulator for better pay, terms and conditions, and for trade union recognition.
And Lyn Turner, Unite industrial officer, said that “the situation for the Edinburgh-based workers is even worse than their London-based colleagues”.
“The FCA staff in Edinburgh will be around 10% worse off for doing the exact same work and until now they have been on the same pay scales for that work,” she said.
“So much for the UK Government’s levelling up agenda.”
There is set to be further action on June 9 and 10, and then July 5 and 6, the union said, and members would be working to rule on non-strike days from Friday as part of the dispute.
In April the union said more than three quarters of its members at the regulator voted in favour of industrial action, and a further 89.8% voted to support action short of strike.
Ms Graham said members “must be congratulated for taking a stand against the disgraceful actions of the management under the leadership of the CEO, Nikhil Rathi”, and added that “nobody takes industrial action lightly”.
“Management’s ludicrous claims that the changes will boost worker productivity has only added insult to injury,” she said.
“And then by refusing to recognise the right to an independent trade union, they have really shown the depths to which they are prepared to sink.
“It is frankly disgusting that a public sector employer like the FCA thinks it can behave with such contempt towards its workers.”
The FCA, which regulates the conduct of 56,000 financial services firms and financial markets in the UK, and serves as the prudential regulator for over 18,000 of them.