Ian,
I just had a look at your site, and to be very honest with you, If I were a potential customer, I would just close it down and look at another link.
There was far to much on there, and it got a little boring, as a customer I want a window cleaner and not the full life history of you or your company.
Take a look at a few of the guy's web-sites, they are straight to the point and give an out lying detail of what they offer.
Its like having your van all sign written and having the largest text with your own name on it, The only words that will attract there attention is window cleaner, thats when they will look for a telephone number, the rest of the text on the van is irrelaveat, and usually of no interest to a potential customer.
Don't take this post the wrong way, is just what I see, and what I see as a USP