The head of Britain's central bank called on the government to break up Royal Bank of Scotland so the state-backed lender can return to health and be sold to the private sector.
RBS needs to split off the bad assets on its books and build up capital at the remaining "good bank" so it can lend more, Mervyn King said on Wednesday, just weeks before the Bank of England becomes Britain's banking regulator.
King also said it was "nonsense" that the government, which bailed out RBS during the 2008 financial crisis, did not have more direct control of the country's fourth-largest bank.
"The whole idea of a bank being 82 percent owned by the taxpayer, run at arm's length from the government, is a nonsense," King told a parliamentary committee. "The arguments for restructuring sooner rather than later are powerful ones."
RBS shares fell after King's comments but later recovered. They were trading at about 314 pence, up 0.5 percent on the day.
RBS and Britain's Treasury declined to comment on King's criticisms.
Finance Minister George Osborne said last week that creating a good and bad bank from RBS would face "considerable obstacles," not least the need to spend more taxpayer money to fully nationalize the bank first. Osborne has welcomed RBS's own moves to accelerate its restructuring.
Analysts said breaking up RBS would be a big distraction.
"I think the idea of attempting to re-engineer RBS now would be ludicrous. Non-core assets are now comfortably below 70 billion pounds so the idea of restructuring the group on that sort of basis makes so sense whatsoever," said Ian Gordon, an analyst at Investec.
The issue is likely to resurface later this month when the central bank's Financial Policy Committee discusses a report from Andrew Bailey, Britain's top banking supervisor, on how much restructuring and extra capital RBS and other U.K. banks may need.
Order of Magnitude
RBS has already undergone a massive restructuring since the government pumped in 45.5 billion pounds ($68.8 billion) in 2008 to keep it afloat.
It has shed around 900 billion pounds worth of assets and says it is focusing on lending to British households and small businesses.
The bank is in the fifth and final year of Chief Executive Stephen Hester's plan to restore it to health. Hester has said the bank will then be in a position for the government to start selling shares prior to the next election in 2015.
King said Hester had "struggled manfully" to fix the bank but more aggressive action was needed.
He added it should not take more than a year to carry out a much more decisive overhaul of RBS and the hit to public finances of such a move was a price that had to be paid.
King declined to put a figure on how much U.K. banks may have overestimated their capital buffers, and therefore need to raise more capital, ahead of the FPC discussions later this month.
"I do not believe these numbers are likely to be of an order of magnitude that will make it impossible for the UK banks to raise the appropriate capital," King said.
The BoE has taken an increasingly tough line on the amount of capital banks hold to protect them against the kind of shocks that triggered the financial crisis.
The government has chosen Bank of Canada governor Mark Carney, a leader of the global push for stronger banking regulation, to succeed King in July.
King, making one of his last appearances to lawmakers before he retires, also criticized the ability of bankers to speak to the government's top officials, even after the financial crisis.
"I was surprised at the degree of access of bank executives to people at the very top. It was certainly easier access to people at the very top than the regulators had," King said.