Discussion: Haven't you got

1 1/2 miles to go ?

(Good effort BTW, not sure I could run that far in a week unless I did it in one long slow hit)

From my experience - knotting, which was really bad for me years ago (hobbling at CSC round 1 in 2013 - to Ifor's despair, LOL) - the problem manifests itself in the calf, but isn't a calf injury - hence you running Nov classic shortly after CSC final . Your calf can't have been really damaged by your CSC hobble.
It's often caused (in my case, anyway) but tightness over the hips, & then down the hamstrings - when I started working hard on those areas , hey presto, the calf stopped knotting.

Just my thruppence worth. Not saying a calf massage won't help, but my physio (who's also an osteo) never treated my calf when I had knotting as he said the calf in isolation was 100% fine. He got me stratching first hips / glutes/ then hammies; then lastly, calves. Not saying it cured me overnight, but I've not had a knot now for 2 years, so it's been good , for me.

HTH.

Thanks guys. Phil what do you mean by 'working on'? Stretching? I've always been good at stretching my hamstrings but have neglected my gluts until recently. I'm now working on these and (combined with massages and strengthening exercises ) have seen some improvement.
Maybe not surprising that i got a problem after a rolling 40 mile (almost ) week. No idea when i last managed that. I hope my first week of the year isn't my biggest.

Yeah - stretching, glutes, using a pull-towards opposite shoulder grabbing outside of knee, then hammies. . Liz will also "work" on them, on the very rare occasion she deigns to see me. She will work on freeing up the tight bits on the glutes. the resultant extra stretch I can get after 20 mins of that is quite impressive.

40 miles!!!! OMG!!!! I'm not even remotely near that. Good luck.... I would probably have shin & Achilles pain if I ramped it up that much.

I read an interesting article about runners on really high mileage whose bodies seem to be able to fix many injuries whilst still (over) training. Probably all safe from that super power.

Ah, the Tim Tett technique. Not sure that works in your 50's as even Tim is finding out.