Hi Jace,
Many thanks for the advice but it appears not to work. I even tried variations. I'm positive it's not WC as I'm getting nothing on the Windoze either. Regardless, IMHO you shouldn't have to go through some unspecified ritual in order to gain access to bad USB output. I've decided to kill the station output on the web site for the time being and just use the webcam and Met Office Data and warnings.
In the longer term I've had a bit of luck acquiring an old weather station which just might be upgradeable over a period of time but I'll expand more on that in a new thread.
Cheers, P