So good we had to do it twice.

Go-karting round the bay x2.
This time, we went to the very end of the barrage and watched the bridge come up as a yacht entered the bay. The hire policy requests/forbids we go any further, so we dutifully stopped at the bridge barrier. The hour hire sped by even quicker than yesterday, and I know it is on Mr Harry's to-do-list for next year.