A man who launched a foul mouthed and racist rant at a fellow passenger on a London to Brighton train, is being investigated by police.

Clutching a beer bottle, and dressed in a high visibility work jacket, the man can be seen on mobile phone footage uploaded online calling his fellow commuter a ‘mongrel’, ‘monkey’ and a ‘gorilla’, as he threatens to ‘take his eye out’.

YouTube footage uploaded on May 26 shows other passengers, including a young woman, attempting to intervene and telling the man – who appears to be heavily intoxicated – to sit down and be quiet.