I used the 1885/1922 1:2500 OS maps to plan my foray - they perhaps more fairly represent what should be searched for on a site visit - but I have to agree with Witts 1885 and pastscape 2012 there is but sparse evidence 'on the ground' - I have no wish to build up your hopes - I do think however that you have a better chance with your kite than I do with my 6'2'' diminishing height!
Something is not right. This message is just to keep things from messing up down the road