New rear wheel for the first choice bike, as the rim of the (cheapo-hubbed - no point in rebuilding) original split on the way home yesterday. It held out as far as the Bicycle Works, who had a suitable replacement. I left the bike there, walked the rest of the way home, and collected it - now rideable - after dropping FirstBorn at school.
Just about everything else (chain; cassette; chainrings, and - err- front rim) is worn out too - so I've ordered some bits from Spa Cycles, including a dynohub wheel to power the Christmas IQ Fly.
3500 miles of fairly robust urban commuting; I just didn't quite expect it all at once