Of course there has always been thugs, bullies, fights on Saturday nights.......and believe it or not they were reported....we did have TV, newspapers and the radio but this kind of violence is regular, more brutal and it does seem gratuitous.
I lived in post war UK into the 60's and in London in the days of the Krays, but there was an sort of "honour among thieves" which has now gone.
This is personal experience and to my mind there is no doubt that there is an escalation of brutal, spontaneous gratuitous crime in the UK.