Thank you for your interest in my query BushInn1746.
Joseph Gallagher enrolled in the RFC as a 2AirMech in July 1917 and became a 3AirMech when the RAF was formed in April 1918.
There is a lot of information on the internet about the role of the RFC/RAF during WW1 - amazing when you consider the first (successful) flight across the Channel was only in 1909.
I have JG's service and pension record info from Fold3/Ancestry - hence my wanting to establish what and where 43 Stn was. What consituted a "Stn" as opposed to a "TS".