But, as the directly elected mayor, Burnham – who served in the cabinet under Gordon Brown – had to seek approval from the National Executive Committee (NEC) to be considered as a Labour candidate.
Article source: https://www.huffingtonpost.co.uk/entry/andy-burnham-disappointed-and-concerned-by-move-to-block-mp-bid_uk_69765963e4b084939e04c7b2