Speaking to the Evening Standard, Chief Superintendent Mick Johnson, who was the match commander, said: "Picking them out is one of the difficulties we face in terms of taking this forward. The chap who was arrested shouted in an officer's face, so it was fairly easy.
"Another man stood on his own and started singing the 'Y' word, so he was approached and warned and took on board what the officer said. The plan was quite straightforward."
More top news
Holidaymakers reported long queues at check-in desks at the airport on Friday morning.
The events were cancelled on Wednesday in the wake of the Manchester attack to allow police officers to be re-deployed.
The men were detained as part of an investigation by MI5 and the Metropolitan Police's Counter Terrorism Command.