Labour leadership blocked Karie Murphy from running for Halifax seat . List led by ad - hoc multi - strong committee chaired by mark Harman . Given Instructions by Ed Miliband to block the Unite candidate at all levels . Unite general councillor Len was enraged by criticism of Miliband and Harman .
Labour leadership blocked Karie Murphy from shortlist for Halifax seat . List agreed by ad-hoc three-strong committee chaired by Harriet Harman . Given Instructions by Ed Miliband to block the Unite candidate at all costs . Unite general secretary Len McCluskey enraged by actions of Miliband and Harman .