Feel silly posting this under your post, Lady Cav, as my problems are nothing. That said, my peroneal tendon hadn't improved despite 2 weeks of no running and loads of ibuprofen gel and tablets. I happened to check whether there was NHS physio in my area. Turns out you can self refer. I had a half hour consultation over the phone, and have applied for a face-to-face consultation.
In the mean time, I was chatting to a couple of the researchers in my dept., one who is a research physio, the other who is a personal trainer in her spare time. The personal trainer offered to do a tool assisted massage on it. Wow - the effect was immediate and incredible. I've gone from hobbling when walking to being able to run - I'm not going to, but I couldn't even push off with the ball of my foot before. She'd done it twice since, and has offered to continue doing it for another week to see if it can be fixed before the appointment comes through. It's entirely possible it could have got better on it's own, but the immediate effects are quite astonishing - shocking, even. She thinks I'll be running again by the end of next week, whereas the physio on the phone said 6 weeks. The research physio agreed with the PT that another 6 weeks off would most likely be counter-productive, but who knows (and it feels unfair to compare opinions of two people who've seen it with someone I've only spoken to over the phone).
I'm not sure what version of tool assisted massage it is she is using, but I see there are a bunch. I'll ask next time she does it.