Innocuous nudge that led to 'murder': CCTV shows final moments of 'train rage victim before passenger stabbed him 18 times' - as victim's son, 14, says 'when someone says something to my dad he won't let it go'

CCTV footage shows the row in a train carriage which led to a father being stabbed to death and dying in front of his 14-year-old son. Lee Pomeroy, 51, was knifed to death by Darren Pencille just minutes after he and his son boarded a train from Guildford, Surrey, to London Waterloo in January. Pencille insists he was defending himself. The murder trial today saw footage of Mr Pomeroy and his teenage boy boarding the train before Pencille brushes past them, sparking a row which would lead to the attack. Pencille is seen jabbing his finger towards the father and son. The court has heard he accused them of blocking the aisle. Mr Pomeroy then followed Pencille into another carriage, where the fatal blows were struck. Some of Mr Pomeroy's family left the public gallery of the Old Bailey as the disturbing footage was shown. His wife, Svetlana, stayed in court and wept as the CCTV was played. The court was also shown a video of Mr Pomoroy's son giving a statement to the police about his father's final moments. The boy said the row started after Pencille was 'impatient' to get past them and his father wasn't the sort of man to 'let it go' or 'roll over'. Describing the build-up to the attack, the boy said: 'I think the guy [Pencille] was a bit impatient. The time it took was about four or five seconds. I would say he was walking briskly. But he had to slow down, he had to stop.' Pencille then said 'ignorance is bliss' as he walked past them, causing Mr Pomeroy to respond 'shut up', the boy said. Pencille then told him "Man, I hate men like you" and Mr Pomeroy replied the same. The boy continued: 'The guy, I think he said "suck your mum" and then my dad said "I did yours last night". 'I think that annoyed the guy because the guy said "come on, get off at the next station", something like that. And my dad took that as a threat so he got up with a clenched fist.' Mr Pomeroy's son said the pair then went into the next carriage and he could hear shouting but not what was said. He said he looked through the doors but could only see them gesturing at each other and did not see the fight start. He then approached his father after the clash. He said: 'When I walked up I could see the blood so I was like, okay that looks bad, and I could see blood down the side of his face. 'I asked my dad what happened and he just said "he punched me". He wasn't even looking at me.'