http://news.smh.com.au/married-uk-twins-forced-to-break-up/20080112-1lkj.html

Twins who were separated at birth and raised by different families met later and married but were forced to break up when they discovered their true identities, a British legislator says.

"It's a tragedy for the couple who are involved, a terrible tragedy. Everyone's hearts will go out to people caught up quite unwittingly in a case of incest of this kind," David Alton, a member of Britain's upper House of Lords, told BBC radio.

Alton first raised the case during debate on a proposed new law on in vitro fertilisation (IVF). He says it highlights the need for children to know who their parents are.

He fears that under the new law, the biological identity of one parent of a child born as a result of IVF could be removed from the birth certificate, creating the potential for similar tragic mistakes to occur.