Let us know how you get on Pete.
My Baker's Cyst has now been officially diagnosed following an MRI (and initially an earlier physio assessment discounting it as a possible diagnosis!) so as to rule out "anything suspicious". It's been there for months now and it's clearly not going away. I've got used to injuries lingering much longer over the last few years, compared to when I was younger, but it looks like me and my buddy Mr Baker might sail through the rest of our life together
I'm not really complaining as the daily, albeit somewhat attenuated, running routine at least allows me out onto the fells and I've had a (very) few longer outings to the Hows and the Lakes. However, I'm trying to cultivate some mindful equanimity that sees some modest fell running (and fell walking/rowing)as a better option than flinging caution completely to the wind and literally going for broke.