Spain's Banco Bilbao Vizcaya Argentaria (BBVA) is considering a pound stg. 2 billion ($3.5bn) bid for NAB's Clydesdale and Yorkshire banks in a proposal.

The said proposal could allow NAB Chief, Cameron Clyne to walk away from Britain altogether.

The reports also claimed that BBVA and NAB considered teaming up in order to launch a joint bid for the 318 RBS branches, but now NAB is expected to quit its operations in the UK, following the claims that it wants to concentrate its efforts in Asia.

On the other hand, BBVA is also interested in Yorkshire and Clydesdale banks as they would give it sufficient scale and additional cost-cutting opportunities to offer a better price for other British assets.

The purchase of the RBS branches would have added more bulk to NAB's existing businesses and could have generated a higher exit price during any future sales process.

NAB has also warned that the British banking industry was hit hard during the financial crisis. This would make it difficult for NAB to obtain a good price for Clydesdale and Yorkshire.

RBS has been forced to sell branches in the England, Wales and Scotland after it received more than pound stg. 45.5bn in Government aid during the credit crunch.