A 65-year-old businessman was today convicted of the date rape of an air stewardess he met on a dating website, by slipping drugs into her glass of wine.

Finance director John Campbell, from Gerrards Cross, spiked the woman's drink with party drug ecstasy in the back garden at his home after meeting through the website millionairematch.com - before having sex with her.

The air stewardess had struck up a relationship with Campbell after meeting him online but later told police she "lost" several hours through having memory blackouts and being violently sick after having the drug secretly dropped in her drink.

Campbell, who lives in Upper Meadow, told a friend that he liked having sex with women who had taken drugs because the effects "left them screaming for more," but insisted the sex had been consensual and his partner had instigated it.

However, the jury today found him guilty of rape and administering a substance with intent to overpower or allow sexual activity.

Campbell had spiked the woman's glass of wine during a rendezvous in the back garden of his Buckinghamshire home on June 14 last year, the court heard.

The woman, who cannot be named for legal reasons, had been drinking rose wine in Campbell's home in the summer sun one evening when she became very ill after Campbell had topped up her glass.

Alisdair Smith, prosecuting, told the jury: "The prosecution argue that he gave her MDMA, commonly known as ecstasy, without her knowledge and, whilst she was stupefied by the drug, he had sex with her without consent.

"If she had her ability to consent to sex taken away from her by the drug then having sex in these circumstances is rape."

Divorcee Campbell, who had previously been married for 30 years, tried to convince the air stewardess that she had a bad case of food poisoning, the jury was told.

However, she replied that she had had food poisoning before but had never suffered with it so badly, telling police that her pupils became dilated and she could not stop herself from clenching her teeth - a side effect of taking MDMA, or ecstasy, jurors were told.

When interviewed by police she confessed to having large periods where she could not account for what had happened to her, before she remembered some of the events in a series of flashbacks.

The pair had been involved in a consensual sexual relationship for some six months before the attack.

Campbell was found guilty of one count of rape and one count of administering a substance with intent to overpower or allow sexual activity.

He was acquitted of a further count of rape and will be sentenced on December 18.