" 
 :, a little AGF goes a long way.  A quick glance at my contribs would show you that it was part of a long AWB run of all sub-cats of . Collecting all subcats usually brings in a few extraneous categories, and I had already spotted  as bring lots of Derbyshire into the set.  I had also spotted that the Manchester Ship Canal brought into some other topics outside GM, and hoped that I had spotted and removed all the extraneous material from the list. It seems that I missed that one. 
 :Thank you for spotting and fixing this one. But it was unnecessary to use an edit summary to suggest that I was trolling. (   •  "