Here's a source I knew nothing about until Geoff Haynes drew it to my attention with this entry in the
Great Britain, Royal Aero Club Aviators’ Certificates, 1910-1950, now included in Ancestry. Roger Eastwood left Australia with 7 Inf Bn, but while in Egypt in 1915 received a commission in the British Army, and thereafter served with the 1st Essex Regiment. And evidently learnt to fly while he had the opportunity!
I have created a number of local history projects for which you will find links on this blog. I am a community historian (ie, not paid) living in Essendon. The content of my Empire Called database (see the link to the PBWorks website) is the result of nearly 25 years' research. I began collecting material for the database of local WW1 volunteers in the early 1990s, beginning with hand transcriptions of Honour Boards in local schools, churches, clubs and so on. It was after this that the National Archives of Australia began making digitised service records available online, followed by the Australian War Memorial uploading Embarkation Rolls of the Australian Imperial Force. The Empire Called blog is a companion for the PBWorks website of the same name.
Time Travellers in Essendon and Flemington is set up in the same way, with a website and a blog to report additions to the website. The website is a vehicle to publish longer pieces of research that are too long for newsletters. It also includes various indexes I have worked on for many years, plus photos from various sources which I date and describe in greater detail. You may find something of use for your research.