FSA chairman Lord Adair Turner said the regulator is reviewing its approach to supervision following the LIBOR scandal, but said it would cost too much to prevent all malpractice in the industry.
Former Cabinet Secretary Lord O'Donnell has emerged as one of the leading frontrunners to take the role of Barclays chairman.
Barclays continues to face a leadership crisis following the LIBOR scandal, with two of its most senior executives ruling themselves out of going for the top jobs at the bank over the weekend.
Richard Wilmot, manager of Newton's £1.3bn UK Equity fund, has made a foray into the UK banking sector, snapping up shares in Barclays.
Regulators have turned their attention to at least four of Europe's largest banks in a continued investigation of manipulation of the LIBOR benchmark interest rate.
Ben Bernanke, chairman of the US Federal Reserve, branded LIBOR "structurally flawed" in his first remarks since Barclays was fined £290m for attempting to rig the inter-bank lending rate.
The governor of the Bank of England, Sir Mervyn King, has insisted he did not call for Bob Diamond's scalp before Barclays' former chief executive stepped down.
Leading fund managers including Richard Buxton at Schroders have been increasing their exposure to major UK banks following the LIBOR scandal which has rocked the sector.
Bank of England deputy governor Paul Tucker came under fire again today as an email emerged showing he had discussed LIBOR rates with HSBC and RBS, as well as Barclays, back in 2008.
Bank of England governor Mervyn King will appear before MPs at the House of Commons this morning to give evidence on the UK's financial stability and the state of the economy.