Unite chief advocates change to worker 's rules to prevent illegal action . Mr worker 's union has given union Miliband more than £ 14 million . Tories want unions to get rid of at least 50 % of members for a strike .
Unite chief seeking change to union 's rules to authorise illegal action . Mr McCluskey 's union has given Ed Miliband more than £14 million . Tories want unions to get support of at least 40 % of members for a strike .