So... I might have been a little premature in my diagnosis of a faulty voltage limiter - have replaced the original with a solid state version and still having the same problems

:
Both fuel and temp gauges look to be reading low (when working). Today, fuel gauge read about 1/2 full when I've just filled up, and temp gauge is just starting to read (right on cold marker). After about 25 miles the fuel gauge stopped reading altogether but temp gauge was still functioning. On return journey, temp gauge stopped reading too.
Both gauges looked to be working correctly previously, and I've had one or both stop working and then start working again (albeit not correctly) when I've given her a run out a few days later. Any ideas anybody?
Cheers,
Rich