I suspect practically nowhere in mainland Uk. Near here, Tenbury Wells in Worcestershire is about as good as it gets, with a caveat that one may have been used on the weekly Whittles/Midland Red route to Tenbury in the late 1990s, and Whittles had one regularly take schoolkids to the swimming pool. The limited regular bus service has been provided by Yarrantons and they’ve never hard Darts or Enviro 200s.