Thanks guys. It hammered down shortly after i took the photo. Was ok though, i got to try out the sealant i used on the windscreen. Water just runs off, no more wiper blades!
The sealant stuff is this http://www.cleanyourcar.co.uk/engine-and-exterior/glass-cleaners-sealants/carlack-glass-sealing-kit/prod_348.html
really good stuff!