I've been to Southcote Road quite a few times.
Mostly a waste of time, but did find something decent a couple of times, around £20 - 30 for bj and sex with semi decent looking girl(s) that didn't look completely off their heads. Had two or three phone numbers, but they seem to change it after a while.
Never had trouble with police, but the few times I saw a patrol car around I just went straight away. The girls seem to know nice hidden spots to park the car.
Haven't been in a few months, so not sure how it is at the moment, but I reckon it's a matter of getting lucky that day.
When I moved to Bournemouth about 5 years ago and wasn't punting I lived on one of the side roads and the girls used to knock at the car window as I was parking to go home in the evenings, there were a lot more back then