When Dan said he may have came across a timetable for an independently operated 148 service, I remembered that OK also operated services in the East Durham area. Within the Bygone Era, a thread exists for OK Motor Services containing timetables. One of the timetables is entitled 'OK Travel - The Book' which lists all services operated by the company circa 1990. It's still accessible and downloadable. Within, lies the 151 - an hourly service between Seaham and New Seaham via Dalton-le-Dale. The timing point shown for Dalton-le-Dale is 'The Church' and the route itself lists Dene Road.
It's still possible that another service served the village, but at least I've uncovered one.
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