I've been punting around Swindon for about 6 months now.
Most of the profiles offering BB seem to be the steady influx of Romanian ones which appear for a few days and then disappear again. I suspect a lot of them are just PG selling scams.
I tend to look for profiles that have been advertising in the area for some time before risking a booking and there's a few good ones to be found. I've reviewed all of the girls I've seen.
I'd second SmokeEater's recommendation of Lovely Brunette Lady. Have only seen her once but her service was fantastic. A few other members have reported her as being a bit unreliable in comms though.
I'd also highly recommend Bell40
External Link/Members Only - I've seen her several times and always get a great service from her.