michael fallon claimed the labour leader was willing to trade away britain 's nuclear deterrent in order to secure power in a backroom deal with the scottish nationalists .
mr miliband said the conservative campaign had ` descended into the gutter ' and claimed david cameron ` should be ashamed ' .
deeply personal : defence secretary michael fallon claimed ed miliband is ` so desperate ' for power he is willing to weaken uk defences to win support from snp that