Long story short-ish:
I did a LOT of exercise through January as part of a challenge and I noticed a very minor twinge in my R knee (foreshadowing!) but it went away as I ran. I ended the month with a dose of flu/cold that put me in bed for a few days.
Recovered from my bug, I went back to Parkrun after a week. The knee hurt and I could hardly walk after standing up from my post-run cuppa. Boy was it sore, but it settled with rest over about a week so I went back to Parkrun again last Saturday after 2 weeks resting and the same pain has recurred straight away so I'm back to hobbling around.
Reading up, I'm pretty sure it is Iliotibial Band Syndrome. Does anyone have experience of this and maybe some advice on how long it is likely to take to resolve? Thanks in advance!