The moments two of the London suicide bombers blew themselves up were screened in public for the first time yesterday before a conspiracy trial jury.

A blinding flash and cloud of dust mark the moment when a packed rush-hour Tube was ripped apart causing the death of seven passengers between Liverpool Street and Aldgate stations on July 7, 2005.

Moments earlier the CCTV footage showed commuters hurrying on to the eastbound Circle Line train where Shezhad Tanweer was already waiting to detonate his bomb. Thirty seconds later a bright flash of light is seen in the tunnel. This is quickly followed by clouds of dust that obscure the camera’s view.

As the dust clears, people waiting on the platform look around in confusion and then begin running to the exits. Two police officers approach the tunnel before stopping and turning back.

Kingston Crown Court was then shown a picture of the mangled wreckage of the train. The doors and windows had been blown off and the interior was charred and blackened.

The chilling footage was shown during the start of the trial of Waheed Ali, Sadeer Saleem and Mohammed Shakil. Relatives of the 52 innocent people killed in the attacks and some of the survivors watched from the public gallery and a special annexe as the footage was played. The three defendants stared intently at a screen outside the dock as the silent images recorded the day when four of their friends had set out for London.

It started at 4am with pictures of Mohammed Sidique Khan, Shezhad Tanweer and Hasib Hussain driving from Leeds. Jermaine Lindsay, the fourth bomber, is seen arriving at Luton railway station in his burgundy Fiat Brava from his home in Aylesbury, Buckinghamshire. The other three bombers arrive and park beside his car.

Colour footage shows the four passing through the barriers at Luton station each carrying a bulky back-pack. The camera tracks them on the platform before they board the train to London at 7.25am. An hour later comes the last sighting of the four together as they arrive at King’s Cross Thameslink. The jury was told that 25 minutes later the first of the four bombs went off at Edgware Road underground station, detonated by Khan. Pictures show the wrecked carriage where six passengers died.

In Russell Square, where 26 people died when Lindsay detonated his bomb, little of one side of the train remained. Finally the jury watched Hussain who, the prosecution said, appeared to have suffered a technical hitch with his bomb. He was seen buying an item, said to be a battery, from WH Smith in King’s Cross station.

Wearing sunglasses, he leaves the station and briefly visits a McDonald’s. Minutes later cameras from the British Medical Association in Tavistock Square show a number 30 bus shortly before Hussain detonates his bomb on the upper desk. Pictures from a bus just ahead show panicking passengers struggling to get off as they see the vehicle behind them explode.

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