blimey! If you can take a photo of the Scottish Highlands AND hear it all the way from Northern Territories I think your lens is remarkable!
There only seems to be 30 or so still airworthy..
Photo is too unclear to note whether any cannon barrels or if a two seater trainer variant, but looks to have a 4 blade prop.
A possible candidate might be Spitfire Tr.9 PT462 (G-CTIX). Owned by the Dragon Flight and based on a private strip in Rhuallt, North Wales. It wears the markings PT462 / SW-A. (solely as it's based in North Wales rather than south of England).
Others more knowledgeable than me will no doubt be able to tell you if the pilot has a moustache!