Its not just spelling though, that copy isn't going to be fixed with a spell check. Its poorly written throughout. If you have big aims for this site I'd pay someone to rewrite it all properly.
My own writing is garbage too, so any "real" site I'm working on I'll order properly written content for it. I think you should do the same. In all honesty, some of it is painful to read. Maybe you've just went overboard on trying to get lots of specific words/phrases onto the page, I'm not sure.
We are one of the only sites dedicated to hotels in the Peak District
We are the only UK site dedicated to Peak District hotels
Both can't be true, you need to either stick with the lie all the way through, or get rid of that.
I think the site logo, and the centered image ad below it are good. In comparison, the green map looks like it was done in paint. There has to be a better map of the area available to use, surely.
We are an independent company
If you're an independant company, then you'd list your company number and address, contact info and so on on the site. Without any of that, it just makes me think garbage affil site without any value add. If you want people to pay you for listings then you're going to need to provide way more than you are right now.
Also, what reason do people have to pay you? Maybe there is a great one, but I can't find it on the site. You need to tell people how many visitors you get, or you rank first for "peak district hotels", or you can send x leads for month, or something. Right now it just looks like I'm throwing away £49 to a bedroom webmaster and getting zero in return. I appreciate I'm probably not your target market though, but more and more people who run businesses are web savvy and they are going to be asking those questions.
Why are you sending visitors to the official peak district twitter account? If you do that, and they click the url field on the twitter page, you've just sent them off to another site. I assumed it'd be your own twitter page when I clicked it. Seems silly to send them off your site like that. If you want to link to that twitter I'd at least tell people what it is before they click.