First was back around 1993 from one of those dodgy magazines bought from the mucky book shop in what's now the Gay quarter of Newcastle. It was actually an outcall to my place. I'm sure she said that she was 17 (or maybe just turned 18) and that she'd been doing it for at least a year. I forget her name, Frankie, perhaps.
I saw her twice, the second time was at her place which was 60's flat in Benwell, I think. Nice lass, as I recall.