Hi Danny,
I was involved into a similar project about five years ago - two chaps with a good looking business plan approached me, asking for investment. After looking over their plan, I decided to go ahead.
The particular shop in question struggled at first, as it is directly opposite a Starbucks which opened 8 months after our particular store did. It was clear however the chaps found a suitable location, where the rent was very reasonable for a London store, and where there was a high demand. After about a year, the shop started to make quite a strong return, and is now at full capacity and is looking to expand into a new store in the next few years.
I am very hopeful that your business turns out the same way - keep us informed, and let us know how you get on. If there is anything you need advice on, this would appear to be the place to ask!
I’m no longer involved with this investment, but I gave the chaps a call for you to see if they could recommend any reading material, and they suggested this:
http://www.waterstones.com/waterstonesweb/displayProductDetails.do?sku=3875938
Hope that helps, and all the best!
Stuart Johnston
BlueSky Web Studios
Professional & Affordable Web Design
http://www.blueskywebstudios.co.uk