Guys, I haven't had time to try anything recently other than my last post.
I'm not sure if I followed your guidance as requested. Grateful if you could point out exactly where I need to put the multimeter leads using the pictures I've attached. I think this will be the best way for me to understand exactly where I should be looking at to get readings in order to solve this issue. This will be the last chance before I have to load her onto a van to get looked at by the stealer
I think these are the three points of reference needed for testing, other than the battery...
The ECU connection
The connection between ECU and side stand sensor
Side stand sensor