B & R - thanks for looking, did the same and drew a blank!

Yorkshire Yellow - thanks for the details!  Hope to do a few more caches towards yours soon, I thought we would have quite a few but when I ran the macro it was only 32   

I did try to run the macro to see what squares were available to find but it didn't work.  I was a bit tired last night so probably did something wrong 

Thanks again both, H.