Attempts were made to revive the 28-year-old, who had been staying with four friends, but he was later pronounced dead by medical staff at a local hospital.
Police who attended the scene said that there was no evidence of drugs in the room used by Mr Lister and his group.
Sources close to Sir Edward told The Mail on Sunday that the family vehemently denied any suggestion Mr Lister died through excessive behaviour. They believe he may have suffered from an undiagnosed medical condition.
The family are believed to be making arrangements to have his body repatriated this week.
Last night the Foreign Office confirmed Mr Lister’s death but declined to comment on any details surrounding the tragedy.
The well-known holiday destination is popular with thousands of young thrill-seeking British backpackers and has become infamous for drink and drug-fuelled full moon parties.
The gatherings are advertised on websites promising international and Thai DJs playing music to ‘make the crowd dance and go wild’.