It is true that "none of your business" would have been the correct ansswer - had he not hounded Peter Tatchell for being homosexual at the time of the Bermondsey By-election in 1983.
He has just apologised for the actions of Liberals in the campaign, saying that I regret that in a campaign, actually run often by agents and organisers, the candidate does not have nearly as much say as perhaps they should have, but I take responsibility". "I have never been comfortable about the whole of that campaign, as Peter knows, and I said that to him in the past . . . Where there were things that were inappropriate or wrong, I apologise for that.
He also denied within in the past few days he was bi-sexual, and decided to tell the truth only when he was presented with incontrovertible evidence that he had been talking on all male chat lines. (It is believed they had his mobile-phone records). That was when he decided to tell the world in the "Sun" that he had relationships with both men and women.