A young Saudi prince died in a luxury London hotel after consuming a combination of alcohol, GHB and other substances, an inquest has heard.

Abdullah bin Fahad bin Abdullah bin Abdulaziz bin Jalawi al Saud, 29, was found dead in his £600-a-night room at the Marriott Hotel in Kensington, West London, on November 25 last year.

The inquest at the Inner West London Coroner’s Court heard that the prince had checked into the hotel on November 19 for a planned one-week stay.

Investigators found that he had consumed alcohol at almost three times the legal drink-drive limit alongside Gamma-hydroxybutyrate (GHB), a substance commonly associated with recreational use.

CCTV footage presented at the hearing showed the prince leaving the hotel to smoke a cigarette on the evening before his death.

A cleaner later entered his locked fifth-floor room and found him fully dressed on the bathroom floor. Emergency responders and hotel security were alerted, but efforts to revive him were unsuccessful, and he was pronounced dead at the scene.

Toxicology tests showed a blood alcohol concentration of 222mg per 100ml, above the UK legal drink-drive limit of 80mg and at a level capable of causing unconsciousness or coma.

The tests also detected potentially fatal levels of GHB, as well as cannabis and alprazolam, the active ingredient in Xanax, at a recreational dose. Other anti-anxiety medications were found at therapeutic levels.

The court heard that the prince had struggled with alcohol dependence and misuse of Xanax before his death.

Records showed that he underwent inpatient treatment in August last year at the Priory Clinic in Roehampton, south-west London, where residential care can cost up to £35,000 per week.

During the programme, he received detoxification treatment for alcohol, benzodiazepines and Pregabalin, an anti-anxiety medication.

Consultant psychiatrist Dr Victoria Chamorro told the court that the prince had “engaged well” with treatment and that the detox process had “proceeded without physical side effects.”

The inquest examined the circumstances surrounding his death and the role of multiple substances found in his system.