LONDON (Reuters) - Consultancy PwC has been appointed to run the remnants of Britain's 'bad bank' that snapped up assets from collapsed lenders Northern Rock and Bradford & Bingley in the financial crisis.The auditor, criticised by politicians for failing to flag problems at Northern Rock in audits prior to its failure in 2007, has been awarded a 16.5 million pound contract to manage UK Asset Resolution's (UKAR) remaining business, according to a government contract notice posted online.The..