Managed my recent 8 day trip to England without the use of a rental car. Naturally London was easy then Kings Cross to Donny in just over 90 mins, bus to hotel in Wath and managed to get about to Barnsley, Mexborough, Swinton, Rawmarsh, Rotherham and Wath on the buses including some fairly late drinking evenings. Took a bit of timetable planning and research to get the best day tickets (4-6 quid/day) plus a bit of walking but wasn't too bad apart from Sunday service being a bit sparse. Did call upon the help of a former/absent MMadster for a lift at one point though