I really feel for you Jonathan, appalling as far as I am concerned, but unfortunately it no longer surprises me.
We live in a National Park and last year the owner of the land (read 'money grabbing property developer') applied for some planning in the area, one right next door to us. We and other locals all notified the council planners and the Park officials regarding the bird and mammal life in the area but sadly to no avail.
The Park sent a qualified officer to inspect the land and they came back with a report stating that 'there is no mammal habitat in the area'. I couldn't believe it, NO MAMMAL HABITAT, oh well, all the raptors that hunt round here must have been mistaken!
I did call the Park office and pointed out that statistically at some point in their existence all dwellings at some point or another will have mice so therefore will be mammal habitat, so why is an area of moorland with sedge, heather etc; where raptors hunt (for a very good reason) not mammal habitat? Did I get a straight and satisfactory answer? No, in fact what I did surmise was that the officer probably didn't get out of their car and merely did a drive by! It does seem that many of us who spend time 'on the ground' observing and enjoying our rich and diverse biodiversity are far more aware than some of those who have the right qualifications!
I do hope that if you do follow this up Jonathan, the best that can be hoped for is that it doesn't happen again.