Brussels is to curb bankers' bonuses from next year in a major blow to the City and the government.
Barclays has threatened "substantial" job cuts in its London investment bank, ahead of a review of its operations by new chief executive Antony Jenkins.
International banks have given greater flexibility and a longer deadline to meet Basel III liquidity rules.
The UK's four biggest banks may need up to £35bn of fresh capital to insulate themselves against future losses, according to the Bank of England.
The state of banks' financial health remains "obscure" and means they should be avoided by investors for now, Liontrust's Jan Luthman has said.
The government is considering nationalising the 316 Royal Bank of Scotland (RBS) branches currently up for sale with a view to creating a new business lender, the Sunday Times reports.
David Cameron has issued one of his strongest defences of the banking sector yet, telling the Lord Major's banquet those who "trash the banks would end up trashing Britain".
HSBC is investigating allegations criminals used offshore accounts at its Jersey business for money laundering and tax evasion, the BBC reports.
Barclays shares have fallen after the bank revealed it is facing two new US regulatory investigations into its conduct.
Bank of England policymaker Andy Haldane, has slated ring-fencing proposals for being too weak and said "King Kong" banks should be no larger than $100bn.