Just a quick update, it doesn't warrant a new thread so I'll post it on here. Paid the site a visit this weekend with the vision of getting the remaining stuff from the airfield done but when I arrived there was a point to point horse trial on which was located exactly where I wanted to be so I decided to have a look in the rest of the woods to the right of the main site (where the substation is) and see if there was anything else hidden away. There wasn't much else there to be honest just a few smashed up building bases, one complete building base and 3 more blast shelters (how many's that...too many am sick of the sight of them now lol) anyway here's a few pics
roof tile
blast shelter number 6
number 7
number 8
and finally the complete building base
Well it wasn't much but thanks for looking. By the way the building with the nissen hut and the water tower were part of the W.A.A.F dispersal site no. 2