Thanks Martin and Stephen for your advice, I'll wait a bit before I decide
to replace the gauge.

I don't think the thunderstorm was quite close enough to have had an
effect on the cables, and anyway it happened again later in the evening
when no TS was around.

Adrian
--
Adrian Shaw ais@
Adran Cyfrifiadureg, Prifysgol Cymru, aber.
Aberystwyth, Ceredigion, Cymru ac.
http://users.aber.ac.uk/ais/weather/ uk