Ms Moore, 62, announced last month that she was leaving the publication She left after she wrote an article that caused a 'transphobia' row at the paper More than 300 Guardian staff penned a letter of complaint about Ms Moore She said on Thursday that her editors' failure to back her was 'morally cowardly' Last month Ms Moore said the Guardian's editor offered to take her out for lunch This was instead of a public statement denouncing the mass letter