National Australia Bank chief executive John Stewart yesterday said the group was confident about the future of its UK banking operations following a troubled period.
Mr Stewart said the slimmed-down operations had considerable growth potential.
"This is a bank that's coming back quickly in a market with lots of opportunity," he told an analyst briefing.
"And only having a two per cent market share gives us huge upside and lots of choices about which parts of the market we play in."
NAB owns the Clydesdale and Yorkshire banks, having sold Northern Bank in Northern Ireland and National Irish Bank in the Republic of Ireland for £1 billion to Denmark's Danske Bank in 2004.
NAB has merged the operations of Clydesdale and Yorkshire.
"I believe we have made the right call in the UK," Mr Stewart said. "Now there is only one bank, one board, one CEO and one set of product."
Branch networks had been rationalised and operations had converged.
He said the UK was too competitive and sophisticated a market to just "be an ordinary bank" so NAB had differentiated to grow market share.
A key part of the growth strategy was the rolling out of financial solution centres throughout the UK as well converting its existing small to medium business enterprise business into an integrated financial solutions model.
NAB made 14 per cent of its earnings before one-off items of £758 million for the six months ended March from its UK operations.