Despite announcing strong profits for 2011’s final quarter, the Clydesdale Bank’s owner has announced a review of its UK operations, blaming government austerity for future uncertainty.

National Australia Bank, which owns both the Clydesdale and Yorkshire Bank, announced the review with the quarterly results in Melbourne on Tuesday.

According to Cameron Clyne, NAB’s Group Chief Executive, “the UK economy is likely to experience a much longer period of subdued growth with the ongoing sovereign debt crisis in the Euro-zone and the continuing austerity program by the UK government.”

Such strategic reviews can be precursors to sales, or to operational cutbacks, resulting in job losses.

The Clydesdale employs 4,200 people north of the border, with 152 Scottish branches and 15 ‘financial solutions centres’ in Scotland for business customers. Unlike its bigger Scottish banking sisters, it needed no government banking support during the banking crisis. Indeed, NAB is one of the few banks in the world to maintain its AA long-term credit rating, coming joint 12th in Global Finance Magazine’s 2011 World’s Safest banks, in front of HSBC, Nationwide and Barclays, the only other British banks to feature in the top 50.

Appearing before Holyrood’s Economy committee in December 2009, the Clydesdale’s then Chief Operating Officer (and now Chief Executive) David Thorburn told MSPs the Clydesdale’s “very traditional, conservative banking operation” meant it did not participate in aggressive lending nor had a plethora of absurd mortgage products, helping it avoid the government bail-outs resulting from the high risk speculation at Royal Bank of Scotland, HBOS and Northern Rock.

By 2010 the Clydesdale had significantly increased its business lending and pre-tax earnings, entered discussions (from which it later withdrew) to purchase over 600 Lloyds TSB branches and spent £8 million sponsoring the Scottish Premier League.

So what’s going wrong? In September last year, credit ratings agency Moody’s downgraded the Clydesdale’s long term bank deposit and senior debt rating in response to rumours it would be sold off by NAB: rumours which seem a lot more solid given NAB’s announcement now. Before then, the Financial Standards Authority refused Clydesdale’s request to share NAB’s advanced internal ratings-based status, flagging concerns to analysts about its internal accounting procedures.

Potential buyers include NBNK, the new bank ran by former Northern Rock chief executive Gary Hoffman. Ian Fraser, in the Sunday Herald, has already detailed the risk of “triggering a rash of home repossessions and corporate bankruptcies across Scotland” such a possible sale of the Clydesdale to NBNK, with former MPs Lord Forsyth and Lord McCall on the board, could prove.

But NAB’s moves could be less about the Clydesdale going bad, and more about it just not being good enough. Margins are squeezed and lending activity is subdued due to the state of the economy, but the UK operation of Clydesdale and Yorkshire Banks remains profitable, even after today.

Nonetheless, Citigroup analyst Craig Williams describes the Clydesdale as a “millstone” around the neck of NAB. NAB has given £1.7 billion, including a £400m payment last month, to bolster the Clydesdale since 2009, helping to meet regulatory demands and to protect from future loan losses. The announcement of a strategic review could therefore be a decision by NAB to cut its losses from a market where economic recovery still seems far off; especially if its other interests continue to perform better.

George Osborne and the coalition government have put all their hopes in the private sector to drive an economic recovery in 2012; slashing the public sector in the hope that a private sector recovery will boost consumer confidence and increase spending and business investment.

But when the same private sector surveys the state of the UK economy, judges what its chances of recovery are, and then seems to decide that it’s not worth maintaining a profitable business that employs thousands, Osborne’s plans must indubitably be proven deeply flawed.

It would be a travesty for the Scottish economy if an institution like the Clydesdale Bank was diminished. Not because of its banking behaviour, but because a Westminster government continues to pursue misguided austerity measures which don’t inspire and only scare the private sector. Scottish banking, its customers and the businesses it supports, deserve better.