For the past couple of weeks I've been engaged in the one enterprise that experienced boaters never attempt – to be in a particular place by a particular time. And my Dutch barge Wiphala and I (with the help of a few unsuspecting friends), actually made it.

We had to get from just outside Bristol, where my home 'mooring' is, to a place called Sonning, midway between Reading and Henley on the River Thames. That's roughly 90 miles, and it takes about two hours by car. You can multiply that by weeks for the barge.