Everyone must have done this? Walked out to the garage this morning and the Kaff had a rear flat. Changing it takes time (the Paselas are a pain in the proverbial); and the Kaff has different pedals to the other bikes so cleats need changing and aligning.
So. I did what any self-respecting commuter does. I assumed it was a slow puncture, cranked up the pressure with the track pump, listened for any telltale hisses, and raced the puncture to work.
I won! (one stop to try and spot a Woodpecker I could hear drumming, to no avail)
(and I've got a spare tube in my bag in case I check it halfway through the day and it's flat again).