Barrie and Tony Drewitt-Barlow, the UK’s first gay surrogate dads, have been accused of faking the results of clinical trials.

The couple, who are parents to five children, including two sets of twins, deny five counts of contravening the Medicines for Human Use (Clinical Trials) Regulations.

They appeared at Southwark crown court yesterday alongside three other people.

The charges relate to their company Euroderm Research, which went into liquidation in 2008. The business conducted tests for dermatological and cosmetic products.

The Drewitt-Barlows are charged with letting participants take part in trials more than once, failing to complete consent forms correctly and making a false application for an ethics committee opinion by saying Barrie was a nurse when he did not hold the necessary qualifications.

They made history in 1999 when they travelled to the US to conceive twins Saffron and Aspen through a surrogate mother. The couple now have three more children.