Human rights campaigner Peter Tatchell has promised to be on his "best behaviour" when he marches with Gordon Brown's wife Sarah at the London Pride parade, this weekend.
Speaking to Pink Paper, he said: "As a Patron of Pride London, I am delighted that the Prime Minister's wife, Sarah Brown, will be marching with us on Saturday's gay parade in London.
"I look forward to marching with her. Sarah's participation is much appreciated," he added.
"I won't embarrass her. I will be on my best behaviour. But I do plan to remind Sarah that she and Gordon were able to get married, whereas gay couples cannot. Her husband supports the ban on same-sex marriage. He won't give lesbian and gay partners the same right to marry as him and Sarah have enjoyed.
"I hope Sarah will be persuaded that the time has come for marriage equality, and that she'll have a word in Gordon's ear when she gets back to Downing Street after the parade.
"Civil partnerships are not equality. They are a form of sexual apartheid: gay couples cannot have a civil marriage and heterosexual couples cannot have a civil partnership. It is wrong to have different laws for gays and straights. In a democracy, the law is supposed to apply equally to everyone. This means equal marriage rights for all."
London Pride takes place in Trafalgar Square, this saturday. Guest speakers include Boris Johnson, Harriet Harman and Mariela Castro.