MP Alan Johnson running for London mayor in 2016?
25 May 2012 Last updated at 10:50 BST
Former Home Secretary Alan Johnson said he had no ambition to be London mayor but added "don't rule anything out".
He has admitted to considering running in the 2012 race, but claimed "my allegiance is to Hull, not to London".
Mr Johnson then said he would have to stand down as an MP if he were to run in 2016.