A US chatroom user has told how he desperately tried to get someone to call 999 as he watched a British plasterer hang himself live on webcam on Christmas Day.

The horrified American watched on in horror as his internet acquaintance Gregory Tomkins, 39, took his life.

He had no idea where the Sutton man, from south London, lived and begged UK-base users of the internet forum to dial 999.

Pictured: Gregory Tomkins posed a photo of himself online with the words 'Merry Christmas' shortly before he livestreamed his own death on an internet chatroom where users insult one another

Tragic: Just days before Gregory took his life, he updated his biography on Facebook to read: 'JUST DO IT'

But the chatroom administrator known as Throat Punch said his attempts were 'futile' as others simply watched the man die in front of their eyes.

He said by the time emergency services arrived at Greogry's home, it was too late.

Gregory was a frequent user of infamous chatroom Apple Inc Insults. The forum is one of 5,000 on controversial video social site PalTalk and encourages users to verbally abuse one another.

The software is used by more than 7 million people worldwide has been blasted in the past for helping terrorists to communicate.

It hit the headlines in 2007 when British man Kevin Whitrick, 42, committed suicide in devastatingly similar circumstances.

The father of two logged onto an insults chatroom, as Gregory did on Christmas Day, and was goaded by members until he took his life.

Speaking today Throat Punch said he was distressed at not being able to contact 999 when he saw 39-year-old Gregory on his computer screen.

He said: 'As an admin in the room at the time this tragedy took place, the frustration of not being able to contact police because dialling 101 or 999 from a country outside the UK became immediately apparent.'

In the early hours of Christmas Day, Mr Tomkins, a self-employed plasterer in his 30s from Wallington in Sutton, south London, logged onto the chatroom and hanged himself

A Met Police spokesman said: 'Police were called at 3.36am on Monday, December 25, to an address in Wallington after concerns were raised for the welfare of an occupant'

The American said: 'By the time it took me to get a room member from the UK to contact 999, it was way too late.

'Sitting by watching people ignore requests to call police was truly futile.'

Online contacts described Gregory, a regular to the site, as a 'lovely soul', but said the internet chatroom where you got to get insulted was 'not the place for him'.

He is thought to have joined the chatroom in the early hours of Christmas Day but instead of speaking, as he usually did, he was silent.

A person who wished to remain unnamed said Gregory slowly panned away from the camera and within seconds, he had hung himself.

They said: 'He had come into the room on his regular screenname that he uses.

'When he actually comes in the room he is always on the microphone and he talks.

'But this time he didn't talk and he was just sitting there. After he left the room he cammed up, and that was when he did what he did.

'It took him literally 30 seconds to go from sitting down to hanging.'

One person known on the forum as Putin wrote: 'Gregory Tomkins was a funny man, he did a lot of funny stuff in the chat room but he also got upset a lot and would do silly things on his cam as well.

'I just think he was very lonely as he had a difficult past which he spoke about a lot.

'But he always meant well, you just were never sure what mood he was in when he entered the chat room. I do not think an insult chat room like this was the place for him.'

Another chatroom called Alinity wrote: 'Yakka was a funny guy he will be sadly missed.'

MailOnline has contacted PalTalk for comment.

A Met Police said Mr Tomkins death was not be treated as suspicious and his elderly parents have been informed of the incident.

The spokesman said: 'Police were called at 3.36am on Monday, December 25, to an address in Clarendon Road, Wallington, after concerns were raised for the welfare of an occupant.

'Officers attended. A man, believed to be in his 30s, was found unresponsive and pronounced dead at the scene.

'Next of kin are aware. The death is not being treated as suspicious.

'A file will be prepared for the coroner.'

Residents in the quiet surburban street in south London said he had had run-ins with the police.

Next-door neighbour Janine Harmer, 38, said she heard banging from Mr Tomkins top-floor flat around 3.30 am on Christmas Day.

Ms. Harmer said: 'There was a lot of banging. I did not know what was going on. It went on for a few minutes.

'The bedroom is at the back.Its really bonkers. I sad to my boyfriend, 'Is somebody building an ark in there?'

'He used to play his music really loud at all hours. Sunday at 8am, late into the night. It was dancey, garage music.

One local who had lived in the street for eight years said Mr Tomkins was 'a bit of a loose canon'.

He said: 'I think he had some dealings with the police. Occasionally they would be here. He would shout out the window at people passing by. He maybe had some mental issues.

'No one knew.much about him. It's really sad.'

On Thursday afternoon, Mr Tomkins white Mercedes work van was still parked outside the three-storey converted house.

Neighbours reported seeing him drive home the vehicle day around 5.45pm.

One resident which lives in the flat below said 'I did not see him very much'.

The neighbour, who asked not to be named, said: 'He lived alone here for a long time. He was a very private person.'