hi ukm, i cant remember how long as i dont think we did it end to end, i was 12 ish and it was about 1980/81.
wife and i took our kids camping to whitby about 4 years ago and i can remember that the at the light house you walked infront of it (the sea side) now that has all eroded away and you have to go behind it.
i was chatting to my son yestaerday and he seems to be up for a good walk so thinking of arranging one for next year.
regards
steve