No, I'm a lawyer. I'm astonished that police officers are still saying that we don't have an organised gang culture. We may not have the scale of problem that the US has, but the infrastructure is in place here and we are pretty firmly on that road.
There are a couple of "big" gangs (not in London surprisingly) which are close to what people probably imagine an American gang to be like. These have supporting gangs linked to them - Croydon is a big area for these groups - and they are involved with particular sorts of offending. In turn, these London gangs have junior "feeder" gangs linked to them. There is active recruitment and there are recognised links between different gangs.
There certainly are some smaller, less organised gangs but the problem with these groups is that they often have aspirations to come to the attention of the bigger gangs.
I am genuinely surprised that the police aren't accepting this across the board. Even if I hadn't spent months at a time on long gang cases talking to specialist police and learning more about gangs and their culture, it would still be obvious from the caseload we have that there is far more going on than groups of kids getting together, naming their gang after the street they live in and deciding that they are at war with the next postcode.
Even the lower-level groups are up to their eyeballs in some pretty nasty stuff. One of my big cases involved a group that initially slipped under the police radar as they didn't have any direct links to any of the high-profile stuff. When they eventually rounded them up they found that they had been responsible for a sizeable percentage of the violent robberies in the borough and that their leader was actually tied in with one of the more serious gangs.
We have a real problem and it needs to be tackled with understanding of just how complex it is.