Clayhead, you gave me a clue of 4ft 8.5 ins for this answer but I am still floundering in the dark. Could you please give me a further hint. I think I know the route to go down but cannot make a start. Thanks.
I don't know this Challenge, BabsG, so I may be completely wrong but if the first sentence of your previous posting is a clue to a place the answer may be a six-letter word meaning a type of bench.