The demonstration eventually made it to Kings Cross, and it quickly moved into the Eurostar terminal. It kept moving around the terminal until it eventually made its way to the check-in desks and border control. A group of people managed to go throgh the check in and into the border area, which provoked a quick, and quite freaked-out, response from the security personnel. After a while people decided to leave the terminal in a group, at which point the Transport Police turned up. One protestor got arrested.
Related reports from IMC-London wires: