On my lunchtime bicycle ride, I ended up getting a puncture, and got to push my pushbike ~3.5 miles home. Joy. At least it wasn't as hot as yesterday.
In the evening, I struggled to get the rear tyre off (damned deep V rims), found a sodding great hole and patched it. I put a new tyre on, put the wheel back on and changed the front tyre. When I'd finished that, I discovered the rear tyre was flat again. I put air in it, and checked again later, and it was flat again, so I figured that the patch wasn't holding, and pulled the wheel again. The patch was fine, there was another damned hole. I fixed that, and it looks like everything's fine now.