After control hanging I got a phone call from a dog walker (9:30am - starts from 10:30) and it turned out that although we had been granted permission for these specific courses by the owner of Wharncliffe, we had not got permission for wheata woods. I didn't know there was a section of wood called wheata and there had been no mention of the fact that they couldn't give us permission for the controls in this area at all while negotiating permission (although it had been pointed out that they didn't own Greno so couldn't give permission there, which I already knew and had applied for permission in!)
So, replanned the courses, redrew all the maps, delayed the starts by half and hour. Skin of the teeth job, but completely out of my hands! Gotta love it when that happens....not very smooth...
In case anyone was wondering, I don't think we would have been granted permission:
http://www.heritagewoodsonline.co.uk/map/033/Wheat...
Although there is a LOT of evidence that bikes ride through there all the time....