The resulting embryos were implanted into the womb of a second woman, Rosalind Bellamy.
They returned to Britain, where they briefly enrolled Saffron and Aspen at the same Hertfordshire school as Brooklyn Beckham.
No other establishment would do, they hinted, because of the constant kidnapping threat to their offspring.
A spot check of the Gaydar website revealed 500 men were advertising from around the immediate area.
Ironically, given the pair's weakness for uniforms, the Mail discovered their detached, rented £600,000 house belongs to senior police officer Ian Learmonth, formerly based at the nearby Essex Police HQ, but now promoted to Assistant Chief Constable of the Strathclyde force in Glasgow.
'Horny Fun Wanted' proclaims one typical advertiser on the gay dating site, displaying a full frontal nude picture of himself for the delectation of passing browsers.
Others express preferences for all kinds of unprintable activities.They prefer to ignore the fact that pictures of children on any website carrying such explicit material, heterosexual or gay, would provoke the same concern.Barrie has tried to make light of the couple's recourse to the dating site with a jovial reference to Little Britain star Matt Lucas's outrageous character, Daffyd.Three years later, it was used to impregnate a second surrogate mother, Donna Cellarase, who gave birth to Orlando, now aged three.It means their sons are genetic twins despite being born four years apart.Users are, disturbingly, asked to click a box to say whether they prefer safe sex.