I witnessed most of it with my daughter. Her mother dropped her off on London road and 5 mins later called us to tell us she had just seen “40 odd fighting off a side street and across her car”. Then all they masked GB lot walked down by the emirates away from the ground and away end. I walked back up to the ground. Airdrie fans were lined up against a wall and singing. Celtic fans weren’t happy with what was being sung and punches were being exchanged on both sides. It had subdued and another airdrie bus arrived on scene and it sparked up a bit again. A few mins later all the masked lot came back up and joined in the action. Polis spilt it up and then the missles were launched from the masked lot towards airdrie fans. And it was normal airdrie fans, families, old folk, women and also some young lads that Were giving as good as they got for a while. The masked lot and Celtic fans then tried to block the entrance to the ground and fought with police. If the more boisterous contingent of Airdrie fans had not been else where at the time then it would have been a full scale riot.