While there are quite a few beautiful blondes who do pussy fisting these days, this is from one of the earliest and best sets I have seen (where a beautiful blonde does that, this is...'before' not to be nasty, finding decent looking women who would do it once upon a time was hard).
I'm not sure whether they are British, so if this post should be moved no problem.
Be interested to know if there was a film related to this, or whether it was just a photoshoot.