In which I suffer a series of bike crises before even leaving the house, and have a lacklustre performance.
So as usual I started getting set up about an hour before I needed to set out for Astwood. When I came to pump the tyre up on the P5 TT bike, I found that the front wouldn't get up to my desired pressure, then the rear disk wouldn't stay inflated (I think because the valve core came a little loose). So I switched to the P3.