New chainrings and chain on the Dawes. I've been procrastinating, and it was becoming a liability.
Also gear cables. Annoyingly they didn't look as knackered as they felt, but it does seem to have improved the shifting, so fine. I'm slightly concerned the shifters may have seen better days, but we'll see how it gets on. Since they're MTB levers I was able to inspect the nipple end of the brake cables for signs of fraying (there weren't any) so I decided to leave them until the next pad replacement.
While I was in a cables mood, I investigated the rear brake cable on barakta's trike. Remember the Black Oil from the X-Files? That's what was lurking within. No wonder it was being a bit rubbish. Since the rear derailleur (which has a similar cable run) appears to work admirably well, I'm guessing that it was a combination of one of those galvanised inner cables I accidentally bought from Wilko when they stopped doing stainless, and that monsoon we had at Wing in 2016.