Because it's pretty safe to say that nobody EVER got randomly attacked down an alleyway in Brighton at 6am on a Saturday morning.
Thats not actually true, as I have a friend and his wife got attacked a year or so ago outside I think near the Market Inn, 'Hanningtons' and another group of colleagues around that part of town too, I think its a place where CCTV is obscured.
The second group who got attacked and had a jacket stolen are a tough lot with some influence on criminality in Brighton, the Jacket was soon returned whilst 3 of the attackers promptly left town ......