We already have many asian + afro carribean MPs, when it comes to election time, I listen to all the parties arguements and come to an informed decision as to which party gets my vote, the colour/creed/sexuallity of the candidates does not enter into the equation. That said, I dont know how other people feel on the issue, I may be in the majority, or I may be in the minority.
PS, for the record my local MP (Conservative), is white, early 40's and openly gay, he decided not to stand as leader of the Conservatives against David Cameron although many other tory MPs would have backed him, and (in my humble opinion) I thnk he would make an excellent leader.