The government was last night facing the very real prospect of the first British consumers losing substantial amounts of their savings following the collapse of the popular internet bank Icesave. More than 300,000 British savers had accounts worth in total £4bn with the Icelandic bank, attracted by best-buy savings rates of more than 7%, on offer as recently as Monday. But yesterday withdrawals were frozen after its parent group, Landsbanki, went into receivership. Savers desperate to withdraw their cash found they were unable to log on to the website, and, unlike savers with Northern Rock, now face losing any balances...