Britain's first gay dad has become engaged to his daughter's ex-boyfriend – and they're expecting.

Barrie Drewitt-Barlow, one of the first UK gay dads to have twins via surrogacy, has popped the question to his daughter's ex.

Barrie and his ex-husband Tony Drewitt-Barlow made news in 1999 when they became the first gay men to father twins through a surrogacy in the UK,  Star Online  reports.

Now multi-millionaire Barrie is also expecting a baby, through a surrogacy, with daughter Saffron's former partner Scott Hutchinson.

Saffron, 20, is one of Barrie's twin daughters and she dated Scott, 25, for several months before he fell in love with the 50-year-old.

The proposal took place on the island of Hvar off the coast of Split, in Croatia.

In the cute vid, he can be heard saying: "What happened here tonight?

"I wonder what it could be?

“There's Champagne, there's roses, uh, uh, uh, oh... what do you think happened here?

“And is that something over there?"

Barrie and his ex Tony are worth a reported £40m.

They still live together in a £6m mansion and had three more children after their twins, Saffron and Aspen.

The dad set up the British Surrogacy Centre of America in 2000.

Speaking to The Sun, Barrie said: "We are thrilled we are going to become daddies again. Tony is excited too, although it does underline that our marriage really is over after all these years, so it is very bittersweet.

"But we are all going to remain living under the same roof. Tony is Dad, I'm Daddy and while at the moment Scott is stepdad, soon he's going to be Daddy Two.

"We are happy, we want to co-parent our kids and that's all that matters. If people don't get it, that's their problem, not ours."