Tebbit also said he had challenged a minister about legalising gay marriage at the same time as ending male primogeniture in the royal succession.
“I said to a minister I know: have you thought this through? Because you’re doing the law of succession, too.
“When we have a queen who is a lesbian and she marries another lady and then decides she would like to have a child and someone donates sperm and she gives birth to a child, is that child heir to the throne?”
Tebbit joked that the change could allow parents to marry their children as a way of avoiding inheritance tax. “It’s like one of my colleagues said: we’ve got to make these same sex marriages available to all. It would lift my worries about inheritance tax because maybe I’d be allowed to marry my son. Why not? Why shouldn’t a mother marry her daughter? Why shouldn’t two elderly sisters living together marry each other?””