Insolance+levels

NASA data on solar radiation all around the globe... handy to work out solar power in UK: http://eosweb.larc.nasa.gov/cgi-bin/sse/global.cgi?email=vj_perry@ymail.com

UK site for the same: http://badc.nerc.ac.uk/mybadc

Application to work out the radiation level: http://re.jrc.ec.europa.eu/pvgis/apps3/pvest.php