I guess it is a case of the law being what the judge delivers in his decision. However, if the start of the LDA is here, and you land before that, does that not suggest that you might be landing other than on the runway ? Whether the surface is seal or not might not be held to be all that important if things go awry ...
Seeing you are in a lovely area ... I think I can guess which hills you are coming over landing toward the sea ... quite a displaced threshold, indeed ... I have some pix tucked away somewhere at home of Otters and Nomads probably 30-40 ft above the cars a long way from the runway ........