When I lived in Bournemouth last year there are evening buses, but nearly all of them are inside the town. The interurban ones all stop after 19:00 with the exception of the 40 (Swanage - Wareham - Poole) which has one bus into the evening, the 50 (Swanage - Studland - Sandbanks - Bournemouth) in summertime only, and one single departure of X3 (Bournemouth - Ringwood - Fordingbridge - Salisbury) on Friday / Saturday night only.
Yes I'm mainly focusing on these areas now. Why do these areas have high car ownership given the proximity to London? Isn't it that the more rural the place, the higher the car ownership? I'm definitely expecting high car ownership deep in Cornwall or in Scottish Highlands but the Home Counties are just an extension of the Greater London built-up area.