The conflict may go deeper than merely a turf war.
As per my previous post Companies House confirms the director of HB to be Iranian while the Companies House entry for MK confirms its director to be Iraqi. He is also named as one of the accused...
To settle your discussion the Companies House entry for the director of HB who is also one of the accused confirms he is in fact Iranian, not Turkish....
https://find-and-update.company-information.service.gov.uk/company/15490992/officers
I had the same thoughts as you about the Glasgow Ice Cream Wars (see posts 31 and 91).
The other barber shop across the road is allegedly where the assailants came from (see post 28).
I was in the middle of getting my haircut when all pandemonium broke loose. I wouldn't have minded but I was appearing on Top of the Pops later that evening.
When I read that for some reason it made me think of the Glasgow Ice Cream Wars which was a turf dispute amongst mobile Ice Cream vendors in the 1980s which got pretty nasty.