Royal Bank of Scotland has been accused of committing the "ultimate betrayal" as it announced plans for further job cuts.

The Edinburgh-based bank is offshoring work within its Fraud and Chargeback areas to India, with 66 workers facing possible redundancy.

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The announcement has prompted fierce criticism, with trade union Unite claiming the move is "unjustified" and calling on the taxpayer-backed bank to reconsider.

Rob MacGregor, Unite national officer, said: "The loss of these Royal Bank of Scotland jobs from the UK is the ultimate betrayal for the workforce. The bank is continuing the senseless cutting of important back office functions.

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"Unite is calling of RBS to reconsider this offshoring to India for the sake of their staff and their reputations.

"The union will now press the bank to ensure that they find all staff affected by the offshoring news today suitable alternative employment."

Most of the jobs affected are based in Southend in Essex.

RBS said it would look to redeploy staff where possible.

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A bank spokeswoman said: "With RBS becoming a smaller, simpler bank, we’ve been restructuring our back office support so it’s a better fit for our business. Unfortunately, these changes will mean some job losses.

"We realise how difficult this news will be for our staff and we will be offering support to all those affected, including redeploying people in to other positions where possible."