Thanks for that. It is definitely the base station... I have a Vantage Vue console that I kept when I bought the Vantage Pro and that was picking up the wind when the Pro wasn't!! I decided to press a few buttons randomly on the Vantage Pro and
'lo and behold' the wind data returned. Now, however, the Vantage Pro will not transfer data through the data logger to the software on the pc!!!!
... and, guess what.... the Vantage Vue console does!!!! Now I'm using the Vantage Vue in the place of the Vantage Pro +... weird....