On "Welsh Caravans"
on "FAQ" subpage, get rid of the red on white, it looks horrible. Instead change Question to being in bold and Answer to being in normal, black.
Same for "Terms of Business", change numbers to black bold.
"Links" subpage, the "Join our mailing list" looks a bit floaty, like it doesn't quite have a place, on further inspection I notice you have "join our mailing list" on every page, perhaps keep it to just one page such as the contact page/homepage. Having it everywhere seems to come across as a bit of a nuisance, the annoying paperclip, "Office Assistant", springs to mind.
On "New Quay Caravan Holidays"
As someone else has mentioned having black on dark blue isn't too good, especially seeing as your target demographic will no doubt include a lot of older people who may have poor eyesight. There's even dark blue on dark blue on "News & Offers" page.
Again same comments with FAQ/Terms of Business and the mailing list.
The "Book now" link just screams untrustworthiness to me. A page before showing that page saying something along the lines of "Booking is done via a different website, click here to go now". Either that or make the booking page appear more inline, as when clicking on it, it looks like a completely different webpage (Different style on the image, completely white). Clicking on the booking dates also doesn't work and there's a random box to the right. I assume the booking page is just a placeholder for now, considering the above?
As a final note the hit/visitor counter just seems tacky to me. I don't know if other people like it, but I've always thought it's a bit...bleurgh.
I really hope this helps, I don't mean to be overly critical, because otherwise it's a good looking website and seems to be fit for purpose. As someone else has said, with tripadvisor reviews being good, use that to your advantage. I for one know I always check trip advisor before I book anywhere and I'm sure many other people do.