Does anybody know how to get an automated weather forecast from the web in the UK?

I have Homeseer, which has a default 'get weather' script which works in the US by sending the zip code to www.accuweather.com. What I need ideally is an equivalent UK based website which can give forecasts based on postcode or area. The output from the website should be a text string or XML which I can then read in a script and use within Homeseer.

Any suggestions / tips would be most helpfull.

Ta

Crozzo 8)