After 50 minutes slow run, outer side of right knee started to ache. I should have stopped right away, but obviously didn't and continued for another 20 minutes or so. I just forgot that this specific pain means only one thing - ITBS.
Starting to stretch, we'll see how it goes.
21/1 - A few days rest a the standard stretches, and Saturday's race was fine.
22/1 - Dull pain started after about 8km. This time I stopped.
Resting due to the ankle sprain has (hopefully) resolved the ITBS.