An alleged victim of Stephen Port told a friend he was meeting the defendant to be paid £800 for sex.

This afternoon the Old Bailey heard how escort Anthony Walgate sent a friend a message with details of his “8ton job” on June 17 2014, the day before he was found dead outside Mr Port’s flat.

Mr Walgate joked that he was sending the details “in case I get killed”, prosecutor Jonathan Rees QC told the jury.

He added that Mr Port, 41, lied to 999 operators, saying he found the body outside his flat in Cooke Street, Barking, despite him paying Antony money to be there.

Mr Rees also accused Mr Port of carrying out his “drug rape” fantasies on his alleged victims and said an analysis of his Google searches revealed phrases such as “drugged and raped” and “gay teen knocked out raped”.

He said Mr Port, who is accused of seven counts of rape and four of murder, raped a 19-year-old male in February 2012 when the defendant was 37.

The court heard how Mr Port met his alleged victim through gay dating site Grindr.

The teenager had travelled from Epsom to central London for a date but had sent a message to Mr Port when he realised he’d been stood up.

After picking the teenager up at Barking station at a time before 10pm, Mr Port is alleged to have given the male red wine.

The teenager, who cannot be named for legal reasons, claims to have had nothing to drink before the wine and, upon draining his glass, found a lump of congealed powder at the bottom.

The court heard how the teenager tried to make himself be sick, before Mr Port told him to go to bed.

Mr Rees said the teenager woke up in the middle of the night naked as a naked Mr Port raped him.

“The prosecution say it’s a case about a man who, in the pursuit of nothing more than his own sexual gratification, targetted, sexually assaulted and in four cases killed young, gay men he had invited back to his flat,” he said. “The prosecution suggest that it is not a hard case to understand because we say all of the offending behaviour was driven by one main factor, namely the defendant’s appetite for having sexual intercourse with younger, gay males while they were unconscious through drugs.”

The court heard how Mr Port, who is charged with four counts of adminstering poison to the men he is alleged to have killed, was “turned on” by sex with “Twinks”, which refers to men who look younger than their age, often having a slim build and little or no body hair.

Mr Rees also said Mr Port regularly took methamphetamine and enjoyed it during a session on June 4 2014, when he was seen struggling to take a 23-year-old he is alleged to have spiked with GHB to Barking station.

Before Mr Port helped the male to the station, he is accused of giving the man the drug claiming it was water, only for his alleged victim to wake up later completely naked and aroused.

Mr Port is also accused of six further counts of administering poison, four sexual assaults by penetration and four alternative charges of manslaughter for each of the murder counts.

He has pleaded not guilty to all charges.

The trial continues.