News, views and top stories in your inbox. Don't miss our must-read newsletter Sign up Thank you for subscribing We have more newsletters Show me See our privacy notice Invalid Email

Norman Tebbit has launched a bizarre attack on David Cameron, saying Tory plans for gay marriage could allow him to marry his own son and warning of a possible lesbian queen on the throne.

In a blistering, foul-mouthed rant, the former Cabinet minister said the Prime Minister had “f****d things up” by pressing ahead with same-sex marriage legislation despite growing resistance from his own party.

His criticism comes as Mr Cameron was dealt another blow yesterday when he was forced to do a deal with Labour to keep his gay marriage legislation on track.

Tory rebels defied him by tabling an amendment to the Equal Marriage Bill aimed at stalling it.

He was also forced to write a grovelling letter to Tory activists in a bid to repair the damage wreaked by “Loongate” .

Lord Tebbit warned the Government had not thoroughly considered possible implications and the problems arising from passing new legislation in a hurry.

(Image: Getty)

The 82-year-old warned that plans for gay marriage could allow families to avoid inheritance tax.

He told the Big Issue: “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?”

The Conservative Party Chairman also questioned how the gay marriage bill could impact on Royal succession.

He added: “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?

“It’s like one of my colleagues said: we’ve got to make these same sex marriages available to all.”

Lord Tebbit warned that disunity over gay marriage and Europe would push voters in the direction of UKIP, who are just two points behind the Conservatives in a recent opinion poll.

He said: “If they (UKIP) make significant gains in the European elections, I know there’s people rich enough to get involved and fund a significant campaign at a general election.”