“He was arrested on suspicion of GBH [grievous bodily harm] and will now be taken to custody for questioning.”
Robinson, whose real name is Stephen Yaxley-Lennon, was wanted for questioning following the incident, which was partly filmed and posted to social media.
British Transport Police initially said they were making “arrest inquiries”, but later said a suspect had boarded a flight and was no longer in the UK.
The alleged assault occurred at St Pancras on July 28, around 8.40pm. Footage posted on social media appeared to show a man at the scene looking agitated, while the victim lay on the floor.
In the clip, the man can be heard saying: “He f***ing come at me. He come at me bruv.”
As two members of station staff attend to the man, he approaches an apparent witness and adds: “He come at me bruv, you saw that.”
A spokesman for British Transport Police said the victim had suffered serious injuries and had been taken to hospital.
He was later released from hospital and is understood to have given a statement to police.