Flatted for the first time in a long time this morning. I was close enough to the office that it was a toss up between changing the tube then and there or just walking to the office. I opted to walk which was probably a mistake. It only took 10 minutes to change the tube, and 30 minutes to walk the rest of the commute.
Oh well. It's not like I would have accomplished anything with that extra 20 minutes anyway. Changing the tube is probably the most productive thing I've done at work in a while.