Jeff Porter cannot help being reminded of the horrific moment a bomb exploded on a Tube as he drove a train in the opposite direction.
For the 56-year-old returned to work despite the trauma of witnessing the carnage caused by the blast - and still drives Tubes on exactly the same line.
Speaking to the Press Association from his cab, the father of two pauses shortly after pulling out of Edgware Road station on the Circle Line to point out the spot where the explosion happened on a train travelling in the opposite direction.
"I saw the train coming in the opposite direction. I recognised the driver. As the second carriage passed I saw what looked like a dull, orange bubble expanding. I had no idea what it was.
Terror plots foiled by British security since 7/7 attack
Terror plots foiled by British security since 7/7 attack
1/10 'Poppy terror plot'
Nadir Ali Sayed, 21, his cousin Yousaf Shah Syed, 19, and Haseeb Hamayoon, 27, were charged with terrorism offences over an alleged plot to behead a member of public. The trio were arrested in London and High Wycombe, Buckinghamshire on 6 November - three days before Remembrance Sunday
2/10 Heathrow airport arrests
A 19-year-old from Coventry man was arrested at London's Heathrow airport on suspicion of preparing for acts of terrorism in November 2014
3/10 Extradition of Abu Hamza
Radical muslim cleric Abu Hamza was used as an example of the kind of people the Home Office has extradited
4/10 South East Counter Terrorism Unit arrests
Six people were arrested on suspicion of terrorism offences after a series of dawn raids in the south of England in October 2014. Three men and three women were detained separately in two properties in Portsmouth, one in Farnborough and one in Greenwich following an operation by the South East Counter Terrorism Unit. Counter-terror officers said they had disrupted what was believed to be the early stages of what could have turned into a “significant plot”
5/10 Law student arrest
A law student who was the subject of a controversial secret trial was convicted for possessing a bomb-making manual, it can now be reported. Erol Incedal, 26, is said to have kept the manual on a memory card adhesive-taped to the inside of his iPhone cover. He now faces a retrial starting on 23 February next year after jurors failed to agree whether he was plotting a terrorist attack
6/10 October 2014 arrests
Three men were arrested in central London on 13 October as part of an investigation into Islamist-related terrorism. The arrests come nearly a week after five men were arrested in dawn raids that Whitehall officials said “may have foiled the early stages” of a plan to attack the UK
Peter Macdiarmid/Getty Images
7/10 Anjem Choudary arrest
Anjem Choudary, the radical activist and co-founder of the banned al-Muhajiroun group, was arrested in September 2014 as efforts intensify to disrupt the ideological backers of young British Muslims travelling to fight in foreign conflicts. Mr Choudary was among nine men held on suspicion of supporting a banned terrorist group and encouraging terrorism. The arrests came shortly after Mr Choudary fired off a series of angry tweets after David Cameron called on MPs to back air strikes against Islamic State militants in Syria
Oli Scarff/Getty Images
8/10 North West Counter Terrorism Unit funds seizing
Police seize £250,000 of cash intended to fund Isis at Manchester Airport and north-west ports. Using powers under the Terrorism Act, the money was confiscated by officers from the North West Counter Terrorism Unit
9/10 Tarik Hassane arrest
A medical student who was offered a place at a London university has been named among four men who are being questioned by counter-terror police after a series of raids across the capital. Tarik Hassane, 21, is believed to have been Tasered when he was arrested on suspicion of being involved in a "significant" Islamist terror plot on 7 October
10/10 Abu Qatada removed from UK
Radical preacher Abu Qatada will not be returning to the UK after being cleared of terror charges in Jordan
"It suddenly became completely dark and the train seemed to accelerate away.
"I heard lots of screaming, but I couldn't see a thing. Everything was just black.
"I stopped the train and I could hear the other train slowly grinding to a halt - then there was absolute silence for a moment. I just wondered what on earth had happened. It just didn't make any sense.
"I could hear someone calling out 'help me, help me', and passengers started knocking on my door. I made an announcement telling people to sit tight and we were sorting things out."
Mr Porter admits it did not register that a bomb had exploded yards from his train, but he realised there had been a serious incident when a colleague banged on his window, shouting out that people were dead, and others were dying.
He jumped down on to the track and made a Mayday call to his controller as he heard passengers on the bombed Tube screaming and crying.
One woman on his train told him at this moment that she suffered from panic attacks.
Mr Porter helped evacuate hundreds of passengers, saying he tried to remain calm amid the chaos.
He says now it only became clear it was a bomb some time after the explosion because it was so unexpected, with no warning.
London was still basking in winning its bid to host the 2012 Olympic Games, and there was no obvious threat of an attack.
"That is why there was so much confusion about whether there had been a power surge."
Mr Porter took a couple of months off work before gradually returning to his job, but will never forget that fateful day.
He is now sensitive to dust and loud bangs even though he never actually heard the sound of the bomb exploding.
Mr Porter is popular with his colleagues and used to be a local councillor, but after the events of a decade ago he finds it difficult to deal with any kind of conflict.
Asked what he feels about the bombers, he said: "They were terribly misguided. It just didn't make any sense - what on earth did they think they could achieve?"
He is planning to spend a few days by the seaside over the anniversary.
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