The 1980 raid was televised as troops stormed the Embassy to free 26 hostages trapped inside.

On the evening of May 5th TV news cut into normal programming to broadcast the beginning of the end of the siege as the SAS soldiers all clad in black abseiled down the front of the building.

Millions watched in awe as they tossed stun grenades into the building to begin their assault.

The terrorists demanded the release of prisoners in Khuzestan Province in southern Iran during a series of tense negotiations with the police who sealed off the embassy and surrounding streets.

The gunmen also demanded safe passage out of the Britain.

Horsfall was particularly angry that the Jamie Bell character is seen as being the leader of the men from the ultra secretive regiment based in Hereford.

'Those watching the film would come away with the impression that he was in charge of the whole mission,' he said.'That is just wrong and is a disservice to the more senior people who were there.The events of May 5th 1980 made sure people worldwide knew who the Special Air Service soldiers were and what they were capable of.For his part in the siege PC Trevor Locke was awarded the George Medal, the second highest civil honour.Pictured: A still from the movie showing an explosion as SAS men storm in Dramatisation: Jamie Bell, best known for his role in 'Billy Elliot,' plays the character of Lance Corporal Rusty Firmin who was among of the members of the elite unit that ended the six day long siege in dramatic style The counter terrorism operation was watched by millions of people on TV over the May Day Bank Holiday in 1980.The film is based on Firmin's book about the rescue and he was also an advisor on film which is a co-production between GFC Films and the New Zealand Film Commission.'When they do speak they all seem to have Scottish accents. Those taking part were all excellent, highly trained soldiers.