labour leader used keynote campaign speech today to suggest deaths of hundreds of refugees fleeing north africa could have been avoided .
in a briefing note sent out before the speech , labour went further - claiming the crisis was ` in part a direct result ' of mr cameron 's foreign policy .
the allegation provoked a furious response from the tories who this morning demanded that mr miliband apologise for the ` outrageous and disgraceful ' remarks .