So much speculation going on here.
Not sure why there gender is relevant. Two aggressive people resisted the local plod. The coppers didn’t know if they were drunk, sober or on drugs. While one copper was grappling on the ground with a second assisting him a third copper ensured the other two were un impeded. Old mate could have had a knife - the copper needed to eliminate the possible threat and contain the melee. He did that. Well done, mate
Agreed. Got to love the Armchair critics who have never been in a life threatening situation. "Oh well, I would have done it this way". Why don't you join the Police and come back in a year and tell us how naive you were back in the day?
These girls were resisting arrest and actually attacking an Officer. If you do that, then please expect things to get physical, as there is literally no other option once you start bashing an Officer.
Drunk people are asked several times to go home before it even gets to this stage. Officers try to avoid arrests as much as possible, as it takes 2 Officers off the streets for several hours (lots of paper work), and it means that cells are occupied, which would be best saved for more serious offenders.
These girls will have been given multiple chances to calm down and go home. You conveniently don't see this in the film, as it's been cleverly chopped to whip up as much froth as possible from Joe Public - which as you can see here, has worked like a charm.