Real progress!
At last I feel I'm making some real progress! We (my two kids, their cousins and uncle, and me) cycled (on two wheels) along the canal to my in-laws near Bradford-on-Avon where we spent the afternoon. Whilst we we're there we went to the BMX bumps course near Trowbridge where there's a basketball court surrounded by a high fence. Ideal for practicing! All the kids had fun on their bikes whilst I spent 30 mins on the unicycle. There was a red semi-circle painted on the court about 20 feet diameter from the back of the court, and I made it my goal to cycle past it (well at least fall off so that my feet were past the line!)
And I did it!
Later, back at the in-law's house, I spent another 30-45 mins practicing and managed to do 20-30 feet rides on a few occasions!
Total time so far - about 3 hours...