235126 Gofarmer -increase UK visitors

I want to drastically increase UK visitors to my farming and rural business website - www.gofarmer.com. The site currently gets around 5000 unique visitors a month but over half of these are from USA and this is not my target market. I aim at farmers, smallholders and rural businesses in UK (and expats in France and Bulgaria) and consumers wanting to buy directly from the farmer. The site does have options in my admin area for SEO for each page and I have already input keywords and relevant meta tags for this. And the search results are meant to be already optimised. I require link building with relevant farming, agricultural and smallholder sites (mainly UK based) to increase PR (4). Maybe press releases and possibly article submissions. And any other ideas to build up traffic and increase awareness of site and brand name, rather than actual messing around with meta tags and pages of site.