Long training ride yesterday in very cold temperatures.  London to Brighton and back to London.  Amazingly sunny day and great to get down to Brighton seaside for a coffee and cake.  A super fat flapjack rescued me on the return leg via Boxhill.  Fantastic group of riders and an epic day on the bike.  Its great to be able to put in this sort of mileage in the middle of December.

Ultegra electronic rear derailleur stopped working twice but came back to life both times after 15-20mins of super high cadence.  Intermittent problems like this are tricky but thankfully infrequent.