Dave,
It looks good, but it needs a bit of 'polish'; some of the English isn't great.
Cornwalls No 1 Window Cleaners is missing an apostrophe; in the About Us section you take GREAT pride in your work and pay GREAT attention to detail. That's one to many 'GREATS'! Use another word or delete the first 'Great'.
'We take pride in our work and our attention to detail is second-to-none?' sounds better than all those 'Greats' (but you've got to check that 'second-to-none' is a hypenated prase (I reckon it is, but not 100% sure; for example).
Overall the web-site wording needs working on; much of it seems too abreviated; it really needs to be looked at by someone who can write good English (and that's not me; I'd suggest Malc G if you don't know anyone) and hone the wording.
A web-site can make you look daft if it's not done properly, and I suspect you've got a great web-designer, but his written English is letting him down.
I hope I've given some constructive critisism and not sounded to overly negative.