Me again.
This is rather good for those who like to avoid clouds - good for planning - here I know probably clouds with bottoms at around 3,000 and tops around 5,000 - but it helps to have confirmation.
This site is rather good
Form to request gramet aero
Seems to work all over the world and processes the raw data into a very good graphic - just put in the icao codes for the route, the time of commencement in hours from now, the flight level.
It then shows the clouds, your flight, the freezing level, rain/snow etc etc. along the route of travel - really, as I say rather good, for us nephophobics