Well... that was hilarious.
About 10 miles out from home, ‘ping’ and there goes a rear spoke.
Wheel tacos out of true, cue brake and mudguard moaning. Had to get the broom wagon home as not a chance it’d ride up the hills. Spent this evening fitting new spoke, truing wheel, repair puncture, strip and clean cassette, generally fuck around to sort all the shit out so now knackered, fed up and out of evening.