Nice B&Bs or pubs in good walking country?

DH has given me a weekend pass so 2 girlfriends & I plan to go walking somewhere - you know, base ourselves somewhere comfy with access to nice food & go tramping during the day, returning to a hot bath & a good dinner.
Can anyone suggest a nice B&B or pub-with-rooms in a location with great walking? It needs to be within a 2-3 hour drive of London (probably no further north than the peak district or west than Bristol).
Thank you!