UPDATE: just two minutes' total delay (£5) on the journey home - no excuses offered.
So here's my Tube Bingo card for the week so far. I guess it was only to be expected with two days from home and very-far-out-of-rush-hour travel, but it's not looking promising. Still, there's always the journey home today to come, and with TfL, you never know!
Total delay of five minutes (£12.50) when you factor in the later connection I was forced to take.