Being in business is a very hard thing to do, everyone thinks your loaded when you have your own company, the inland revenue just as much as the next person, there are too many government bodies these days for a small business to survive legally imo even more so if you need premises.
the government are too hard on taxing businesses and everyone wants a piece of you for it, you name its for a business and its more expensive no matter what you buy/need.

tread very carefully, the first few years will be the hardest, the first year will make or break you, after that you may get sick to death of all the work you have to do at home when not at work/in working hours. being self employed can become very monotonous if your not careful.