Airsmiles - The thing is that if you are going to say prepare a book on the subject for possible publication, you will be asked what is the book's unique selling point. Considering that the subject has been covered by Mike Phipp, you would need to offer something that is different to his book/books or perhaps a far more detailed study of the Hurn than that covered by his book.
For example I have just had a book published on the History of Glasgow Airport and I was asked the above question as the subject had already been well covered by Dugald Cameron's excellent book published in the early 90s. So I tried to give a more comrehensive coverage of the RNAS side and concentrate on the later history of Abbotsinch.
In any event if you are passionate enough about the subject - go for it.