Hitch came a croppa! See that bit of leather on the foot? It's meant to be joined to that arm that controls the wheel - I wore it out!
Thankfully Mr Tom was home for lunch and able to calm my nerves. After a 5 minute hunt for the right screwdriver and another 10 minute hunt for a suitable substitute, we're in motion again.
No photos of the operation I'm afraid, it was just too stressful.
We found a short length of industrial strength woven tape of the untearable, unbreakable, unmeltable type. Even rolled into a tube it's not as rigid as the leather but it makes very little difference really.