Spa Access is listed 'from £45' on the spa's own booking site for three hours of pool, infrared sauna and steam room, with a drink, robe and towels. The exact price may vary by day/time.
The venue's own pages disagree on some details: private banya capacity is given as up to 8 on the homepage and up to 10 in the terms, and swimwear rules differ between the day schedule and package text.
from£75per person
'Just Banya' 2h £75 (book by email, phone or WhatsApp, not online); 3h packages with treatments £120–£235