A lot of first hand reports I've read and heard about concur with the following, taken from Sky on the link above.
as a mancunian i am discraced with the greater manchester police . i have to dissagree with the comments about the rangers fans , i was in the thick of it yesterday to enjoy the football and festivities that were on , yer some fans may have got rowdy with the screen not being on but what i saw after the game was a disscrace . i was walking through manchester after the game , yes rangers had just lost but they were all still happy and singing , and for no reason some riot vans pulled up in the crowds , the riot police got out and started walking through the crowds pushing and hitting any fans that got in there way , there was no need for them to be there . yes the rangers fans reacted naturally and retalliated but if they had not been there , it wouldnt have happend , there was no trouble or reason for the riot police to be there . i was discusted with the way the police reacted and i thought the rangers fans were great