Conflicting demands from investors, customers, regulators and the government will create more pain and struggle for UK banks, according to a report by KPMG, a professional services firm that provides audit, tax and advisory services.

The KPMG report was cited by Bloomberg as saying that the total assets of British lenders fell by 25% in five years to £5.2trn, while capital reserves have increased by £93bn.

Banks have faced £28.5bn of costs for litigation, fines and customer compensation since 2008.

Many British lenders including Barclays, Royal Bank of Scotland (RBS) are continuously reducing workforce to control costs.

KPMG banking global head, David Sayer, was quoted as saying that most board members of the UK banks have taken on their roles post crisis and are committed to making the changes required.

"We must give bank management time to deliver, which will help restore the trust, viability and reputation of the banks.

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"Investors also need to be realistic. They must also readjust their expectations on returns as they are unlikely to achieve the heady pre-crisis levels," Sayer added.