Mr Hedges, 35, who is still undergoing brain scans following the fall, said: "The allegation Ken Livingstone has made - that I 'technically' assaulted him - is totally untrue. I do not know why he would make such claims nearly five weeks after the events. It seems to detract from the central issue, for me, which is my full, ongoing injuries. I stand by my statement published in full in the Evening Standard on 20 June."