The Bank of England’s 50 billion pound credit swap for banks hit by the global credit crunch leaves a “sour taste ” for the Daily Mail, which accepts it is a necessary evil.

“How could allowing banks to swap their risky mortgage and credit card debts (amassed during years of lunatically-excessive lending) for cast-iron Government bonds be anything else?,” it asks. “So much for moral hazard.”

But for the Financial Times the Special Liquidity Scheme, which will swap banks’ risky mortgage assets for easily tradeable government debt, is “cleverly designed and welcome move to ease liquidity troubles.”

It says the scheme will protect the tax payer and does not absolve the banks of the consequences of their past lending mistakes.

The Times is also impressed by the “sensible and imaginative response” to the credit crunch but said Britain’s financial authorities took too long to accept the financial markets crisis was hitting the wider economy.

The deal is the “least-bad option available to economic policymakers“, in the view of the Independent, which calls for an inquiry to determine how the regulatory system broke down.

The Daily Telegraph says the scale of the operation is “startling” and says it is now up to the banks to make sure it works.

Both the government and the Bank of England are to blame for leaving taxpayers and borrowers more vulnerable to the global financial crisis.

“Monetary policy has been too lax, borrowing was allowed to spiral, despite a long period of economic growth, and the banks used the era of cheap credit to pursue reckless lending strategies,” the Telegraph said.