union barons gave more than £ 700,000 to ed miliband 's party , swelling labour 's election war chest for the last 14 days of the campaign .
overall , labour received £ 1.1 million in donations between april 6 and april 12 -- more than twice as much as the conservative party which received just £ 492,512 .
union barons gave more than £ 700,000 to labour in the second week of the election campaign in a boost to ed miliband .