Are you new to window cleaning?
You live in a relatively well off part of the country. Work doesn't fall into your lap, well, not often. I have found you just have to keep trying new estates/commercial sites. Just keep at it. It's the old theory: Chuck enough muck at the wall, eventually some must stick!
I've been at it 19 years. I still get lean times, and wonder what to do.
When you go cold calling, presentation is important. Look smart, positive, polite, trustworthy, and ready for work. It's only window cleaning, but people judge you a lot on first impressions, within the first 20 seconds they have formed an opinion on you. Make it a good 20 seconds, with a nice clear, clean explanation leaflet.
If they ask for a quote, take your time, get it right, don't be greedy.
Wish you well