All change at the Buxton Crescent, so be careful what is and isn't included in your booking. Have stayed here many times B&B to take advantage of the Pools and to some extent, Spa facilities. After the takeover by Champneys, access to these is no longer included if you book through a third party or if you only book B&B with the hotel directly. Then there's a charge of £40pp to access pool and spa. Which seems steep to me.
To access pool and spa within your booked price, you need to book dinner, and B&B directly with the hotel. Hope that's helpful.
As a reminder, it remains a great hotel in a great location - which is why we've stayed several times before. May need to reconsider future occasions though.