Knightxx has knowledge of Ella in Exeter who runs probably the most popular Chinese place in this area for those who punt, so i'd say he's genuine.
I haven't tried this in the UK, but i will say the first and second time are far more painful than you'd expect it to be, 1 or 2 fingers might make you think a small strap-on might be fun, but its a totally different feeling and i didn't like it....just MHO.