You can get most of the weather objects to work for UK on most programs including desktopX, object dock and sysmetrix.
UK post codes are often not the way they work, at least not directly - the two most usual approaches seem to be either to enter your town followed by ,england or ,united kingdom or the slightly more tortuous approach involves first going to:-
http://uk.weather.com/
entering your postcode or town in the provided search engine which will take you to the appropriate page. If you then look in your address bar on the browser you will see something like the below address (click on the link below and check out the address bar)-
http://uk.weather.com/weather/local/UKXX0085
The key here is to take the UKXX0085 portion (this just happens to be London) and use this as your postcode entry in the actual object.
If you still have trouble post again giving a link to the specific weather object your battling with and I''''ll see if I can help directly.
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