Edmund Echukwu collapsed in a swimming pool and died at a 007-themed sex party last Friday . The man who died in a swimming pool at a swingers' party in an upmarket village has been named as a father-of-three. Edmund Echukwu, 35, was pulled from the water at a James Bond-themed sex party at a £3million mansion in Radlett, Hertfordshire last Friday night. Fellow revellers tried to revive him but he was pronounced dead at Watford General Hospital after emergency services were called. It is believed Mr Echukwu is a Nigerian from north London who was at his first swingers' party at the eight-bedroom house. Mr Echukwu's neighbour in Edgware, Margaret Brown, paid tribute to him today. Mrs Brown, 67, said: 'I'm devastated. He was such a sweet guy. I remember I used to talk to him a lot of the time. 'He kept himself to himself, but he used to talk to me and was very friendly. I think he was going through a difficult time. 'He was just such a gentle person. - I can't believe this has happened. Sometimes he would help me look after my disabled husband.' Mrs Brown said she believed Mr Echukwu was a care worker. She said she knew he had two sons from a previous relationship, but didn't see them very often. She added: 'He was a good-looking guy, and he always looked really slick.' Mr Echukwu had told others at the party he had three children, but there was no suggestion he was married, it was reported this morning. A 35-year-old man, named today as Edmund Echukwu, died during a sex party at this house in Hertfordshire . Witnesses said Mr Echukwu was in the water with a woman when he started getting into difficulties . He wrote about his love of football and described himself as an 'evil genius' on Twitter, according to The Sun newspaper. A post mortem examination is due to be held today, after which a coroner will open an inquest into his death. The party was one of the regular swingers' events put on by retired management consultant Richard Stanley, 66, and his partner Janet Harrison, 58. Mr Stanley said: 'I heard a shout and ran over. I dived in fully clothed, pausing only to take my iPhone out of my pocket. He was enormously heavy. 'Three of the guys pulled him out, with me pushing him from behind. They put him straight into the CPR position and tried to revive him. One of the guests was a qualified nurse.' The death happened at a swingers party run by Richard Stanley and Janet Harrison, pictured in a Channel 4 documentary. Mr Stanley said the death may have been caused by a heart attack . The mansion's owners say the pool complies with all health and safety rules and has been inspected . Mr Stanley added: 'I got straight on to 999. The call operator gave very clear instructions, which I shouted to the team performing CPR. We kept doing that until the ambulance arrived. 'Then the police turned up – there were about a dozen officers in total by the end of the night. After interviewing various people, the inspector said to me, 'this is a non-suspicious death'. It may well be that he had a heart attack.' He said guests brought their own alcohol to the parties and Mr Echukwu had 'severely dented a bottle of Jack Daniel's'. A woman who was in the pool with Mr Echukwu was left distraught by what happened, witnesses said. The event on Friday night featured 007 references including a roulette wheel, a woman covered in gold paint inspired by Goldfinger and chocolate replicas of the weapon from The Man With The Golden Gun. The property features a converted attic which Mr Stanley calls the 'dungeon in the sky'
Edmund Echukwu died in pool at swingers' party in Hertfordshire on Friday . 35-year-old believed to be a  Nigerian father-of-three from north London . Owner of mansion says he may have suffered heart attack in water . A post-mortem examination is due to be held today ahead of an inquest .