A former trader fired by Royal Bank of Scotland has said the lender “dishonestly contrived” his dismissal to deflect attention from its own failings in the currency-rigging scandal.

Ian Drysdale, who worked on the foreign exchange desk, is claiming unfair dismissal in a London court after being fired in February by RBS for gross misconduct.

The bank claims Mr Drysdale used online chatrooms to share confidential information about the trading activities of clients, including Russia’s central bank, with staff at other banks.

However, Mr Drysdale defended himself at a London tribunal hearing yesterday.

“They had to find relevant scapegoats, of which I was one,” he said.

“I know I was abiding by the bank’s laws as I interpreted them at the time. I believe I was doing nothing wrong and still believe that.

“I believe the real reason for my dismissal was to deflect attention from the respondent’s (RBS’s) own admitted failures,” Mr Drysdale said in a witness statement.

He added that RBS “deliberately and dishonestly contrived to dismiss me for reasons unconnected to my conduct”.

RBS, which is 73pc owned by the UK government, was fined £217m by the Financial Conduct Authority in November 2014 for failing to stop traders allegedly manipulating FX markets.