So Tony, you are on the cold side of the Pennines. On the Cheshire plain where I live, we have a sort of micro climate, and never seem to get the extremes of anything.
The short journey I had when the bike was picked up, towed the fully loaded trailer, and didn't even know it was there. The chap who had it before had been with it all over the continent and had no trouble with it. The ball joint is fully rotatable, so the trailer stays level, even though the bike is leaning at all angles.
It will be finished one day.
Once you get the hang of posting pics, there will be no stopping you. I had great difficulty when I first started, and got all sorts of wierd results.
John