We have lived in the area for around 8 years, in Farren Road.
I must say that the alley way is of concern, not just because of potential muggings but also on numerous occasions I have observed people riding motor scooters and motorbikes down it. On a few of those occasions I have made it absolutely clear to the rider that I was unhappy about that (although you hardly get time to say much as they ride past). I would ask that anyone who sees this kind of behavior should
take the registration number of the bike.
Regarding the kids and young adults hanging around near the alley way and in Vestris Road: There is a small group of youths that seem to hang around there and in 2010 I noticed the police had been called to a fight they caused, and I have heard shouting, general rowdiness but for the most part they are just edgy young men being edgy young men.
I seriously doubt anyone is in danger from the boys that live in the area.
On a couple of occasions they seem to want to provoke me in some way and I have commented on that to my partner but as far as actual action apart from looking at me funny, I haven't really noticed anything too concerning