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The chairman of the London Assembly transport committee has been filmed in a bizarre row on a train with a woman who was accused of putting her muddy feet on his seat.

In an astonishing five-minute bust-up, Conservative councillor Keith Prince was subjected to an increasingly angry tirade from the woman opposite him, who witnesses said had put her shoes up on his chair.

In her angry tirade, the woman eventually calls Mr Prince a “white idiot” as the row escalates.

Mr Prince traded insults with the woman sitting opposite him on the Southeastern train during yesterday's rush-hour. Footage of the exchange was posted on Facebook on the Dartford Rail Travellers Association page.

The footage shows an increasingly heated argument between the pair, with the woman firing a string of insults at Mr Prince, most of which he laughs off.

What they said: Woman: You're an idiot. You're so used to women being quiet when you talk innit? Touch me again i'll f***ing slap you. You're an idiot Mr Prince: No, you're an idiot W: That's why you're not married you idiot. M: (laughing, shows his wedding ring and makes a noise at the woman) W: Are you married? Are you married? Are you sure? M: Yes W: She's not cheating on you? M: She's a really nice Yoruba lady W: She's Yoruba? So she's Nigerian? She's my people? She's using your money. Trust me she doesn't love you. Touch me again I'll f***ing slap you. Your wife, is where I'm from so I know you know her attitude - so touch me again and I will slap you. M: I don't want to touch you, all I want is for you to not put your shoes on my chair so that I don't have to get dirt on my trousers. (The woman then puts his foot on his chair and he appears to grab her ankle and Mr Prince starts laughing W: You are laughing because you know you can't do s***. Listen my feet is literally by your balls. I'm literally grabbing you by your balls. M: No you're not, no you're not, no you're not W: You're an idiot, you're actually an idiot

She angrily accuses Mr Prince's Nigerian wife Temitayo of being with him to get his hands on his money.

She said: "Stop touching me," adding "That's why you're not married."

Mr Prince replies, displaying his wedding ring, and saying his wife is a "lovely Yoruba lady."

To which the woman replies: “Your wife is from where I’m from – you know we have the same accent. Trust me, she doesn’t love you, she is using your money, you idiot.

“Touch me again and I will slap you, the same way your wife treats you at home.”

Mr Prince then says: "“My wife is not like you.”

The woman then escalates the row further, saying “I’m literally grabbing you by your balls, do you understand this? You know you can’t do sh*t.”

Mr Prince today said he regretted being drawn into the row.

"I regret getting involved in such a petty dispute. This is one of those situations in which it is better to simply walk away," he said in a statement.

“By the end of the journey we were joking with each other and having a pleasant conversation. That said, I’d like to apologise to my fellow commuters for the disturbance our initial disagreement caused.”

A Tory spokesman said: “We are aware that video footage has been posted online of a verbal dispute between an unknown woman and London Assembly member Keith Prince.

“The exchange occurred on a train travelling from Dartford to London Bridge yesterday morning at around 8.30am.”