Married Twins, truth or advocacy?

The Internet is currently buzzing with a story of twins in Britain who met and married, only to be seperated by a judge. This story was passed around and no confirmation is forthcoming as to the validity of the story. Now comes the big question:

Is this a true story or an anecdote designed for advocacy purposes?

The details on the story state that two people (adopted) met later in life, fell in love and got married, only to have their marriage annulled by a judge.

The story is being spread by a Lord David Alton. This same Lord David Alton is currently pressing for the laws to be changed to allow for adopted children to have more rights in finding out who their parents are.

So I ask you, is this a true story being passed around or a clever anecdote designed to help him pass a law?

Sources: Miami Herald, BBC.