solar power purchase agreements

What companies can offer solar power to UK companies without capital investment?
Many companies in the supply of U.S. a purchase agreement for energy companies so that they can get solar installed without capital investment, no purchase of solar equipment at no cost maintenance, only a single monthly bill for solar electricity at a fixed rate. Examples of companies that do this are SunPower, BP Solar USA, etc. .. In companies of the United Kingdom as Ecotricity wind energy supply on the same principles, but I can find someone who does it for solar. I can only assume this is a problem of government subsidies or a slower rate of recovery for the provider? Does anyone know of a company in the UK will provide a solar system to a company on the same principles of: no capital investment, not the purchase of solar equipment, no maintenance costs, only a single monthly bill for solar electricity at a rate of interest fixed?
As far as I know, there's no solar power plant business in the United Kingdom, therefore no electricity. May sell Solar electricity "… In any case, the sun is (currently) on the most expensive method of generation (as you say, no government grants) so if I go solar power, I suggest that 25 years. loan and install your own (the repayment of loans could actually cheaper than that would pay for commercial solar
) PS As far as I know, the most efficient way to use 'solar energy' in the UK (given our latitude) is directly heat the water (instead of generating electricity which is then used to heat the water
)