There have been more calls for adopted children to be given information on their biological families after twins adopted and raised by different families married each other.
Neither of them were aware they had any siblings until they found they were married to theirs'. The High Court annulled the marriage, ruling that it was never valid and the identity of the unfortunate pair has been suppressed.
"The right for children to know the identity of their biological parents is a human right. There will be more cases like this if children are not given access to the truth," said Professor Lord Alton, who discovered the case.