Yesterday I finally got round to getting a gait analysis. It was pretty intimidating and a little weird to have an extremely sporty looking guy poking, prodding and moving my feet around but he seemed to know what he was talking about (I certainly didn't understand half of it).
It turns out my gait is weird. Like, really really quite strange. He videoed me on the treadmill so I could see and I flick my feet out and around as I run and then I land on just the outside edge of my foot at a very strange, almost 45 degree angle. I think we worked out that it's probably due to years of living in high heels, a high arch and tight plantar fascia & achilles. Luckily my posture and alignment is good from the knees up so I don't look odd running unless you look down closely at my feet. The good news is that my gait is so strange that there is no point wearing corrective shoes so I can have any kind of neutral shoes, ideally stable with cushioning. Didn't buy anything on the day but will be hunting around for something that feels comfortable.
Worth doing though if anyone is considering it! It's interesting to be aware of your quirks and learning how all the parts of the foot and leg work as you run is fascinating!