Richard Barklie, who was one of three men police sought after a black man was allegedly pushed off the train by chanting football supporters, has insisted he is not a racist.
Video posted online showed commuter Souleymane Sylla being pushed back onto the platform as some of those on the train chanted "we're racist, we're racist and that's the way we like it".
Mr Barklie, 50, who was a member of the Royal Ulster Constabulary and a Police Service of Northern Ireland officer, is currently a director of the World Human Rights Forum.
The Chelsea season ticket holder issued a statement through his solicitor Kevin Winters, in which he admitted being involved in an "incident" that resulted in Mr Sylla being "unable to enter part of the train".
My old maths teacher was Irish and she was always telling us stories about Ireland and all the racism etc there. It was great tho coz we never had to actually do work
