Early Airfield Markings

Whilst looking at the Hawkinge "target" I posted recently under the Hawkinge thread, I had a look at the Hawkinge chapter in "The Battle of Britain Then And Now [MkI]" page 98. It showed the recently ploughed landing area on 21/10/1979 and clearly visible was the 1930's landing circle with "HAWKINGE" clearly visible and an earlier circle with a cross in it, similar to the one I recently posted. Roy Humphries called the circle and cross a compass rose and stated that it dated from WW1. I'm not convinced as it would seem strange to adopt it as a bombing range symbol only a few years later (not sure when). Could it have been the original design and size of a bombing target?

So the question is what markings were used on WW1 airfields in the UK and what was their purposes?

Judging by the lack of response I can assume this is a subject that might be worth looking at? Further to my original post I changed ther title from "World War One" to "Early".

The link below to a history of Longreach aerodrome (Queensland) shows, in the second photo, a circle and cross marking. This to me is a bombing target but as already mentioned in my previous post it might have meant something else in 1925. The text below the photo states that it is "Note the white circle marking denoting an aerodrome. The cross within the circle indicated that fuel and accommodation was available.". Was this an Australian symbol and meaning or was it Empire or Globally used at that time? If it was widely used it will help me date the use of it as a bombing target if I knew when it wen out of use.

www.airwaysmuseum.com/LR%20aerodrome%201925.htm