Page Rank is somewhat a popularity contest. The best thing to do is make a good site, and get people’s attention. Advertise in the right places, with the right people (right is very subjective, I know, but there isn’t a ONE answer fits all). Network with people in your area, other UK IT support sites.
You can’t just make a website, crank the SEO, and assume people will come. As with any business, you have to get out there, get your brand known, and do it in a way that doesn’t annoy your target audience and look like spamming.