Many dommes will make it very sexual, and most will at least allow hand relief.
I think stuff like pussy worship is quite rare though, and full sex even rarer. In the North West I think you might get some Joy with Mistress Pixie and Sapphire, 2 very tatooed dommes.
It's true that real dommes put large investments in their dungeons and equipment, and that's where you will most likely get a proper BDSM experience.
However I have had some excellent domme sessions in parlours, particularly Roses Retreat, The Georgian, Sheridans and La Maison.
Depending exactly what you want, I can highly recommend:
Martine at Roses Retreat - possibly one of my best domme experiences, especially reverse anal and strapon
Also at Roses Libby, Roxy, and Amber.
At Sheridans Christine, and I believe also Scarlet.
At La Maison McKenzie, Milly, and Brooke when back.