Hi Derek, It sounds like your dash needs a proper rebuild, the symptoms you are describing are typical. I don't know who does this kind of service in the UK, but there a companies over here that would do it. One of them is this one: https://europeanelectric.net/products Apparently we have members wh...

If you want, I can take a look (electrical engineer here).
Maybe reflowing the solder joints will fix the problem.
I repaired my instrument cluster which also had problems (2003 XC90).
And germany aint that far from the UK

I don't know if this would work for you with the brexit, but there is a compagnie in Germany ecu.de, they fixed a bad throttle on my V70 2000 , price were really reasonable. They do rebuild instrument cluster. https://ecu.eu edit: https://ecu.eu/orderrequest-8.htm#UK-Northern-Ireland-Brexit Too bad ...