just made a reservation with D005297 and it reduced the price from £156 to £116 which is pretty good.

Just out of interest, I checked the T&C's and it made no reference to using an AWD at all (whether valid or not). I also had a brief look at the website and all I found was some instruction saying to put in an AWD code if you have one (again, did not mention whether valid or not)

Where does it say about entitlement and proof or otherwise?

Will post back after May 10th as to whether I had any hassle with the above.