Annual rainfall in Manchester 1047 mm, annual rainfall here in the east,say Cambridge 559mm. You get twice as much rain Daz, its just not that much of a problem this side of the country. The downside of that is that joe public arn't as understanding as in your neck of the woods, working in the rain it really doesn't go down well. I usually have a list of "wet day jobs, ie facias although that's slowed down a lot im guessing because of the economic situation. I have to say though, that as a result of doing them in the rain ,ive come to hate doing them. I really wouldnt want to feel that way about windows and im sure that if i did do bread and butter window cleaning in the rain, i would soon learn to hate that too. Your welcome to cleaning in the rain though i totally understand living where you do why its much more of a necessity.