Jo Crowley MADRID/LONDON (Reuters) -Santander's plan to buy TSB for 2.65 billion pounds ($3.61 billion) and boost its position in the UK came together just a few weeks ago, after the Spanish bank had been weighing a possible exit from Britain,

The TSB name could disappear from UK High Streets after the British bank's Spanish owner announced its sale to rival Santander. The £2.65bn deal still has to be agreed by the current owner Sabadell's shareholders but if it does go ahead,

TSB customers could also be moved over to Santander, which would become the third biggest UK bank. Santander said it "intends to integrate TSB in the Santander UK group".