Any type of solar panels will need plannig permission (at least where we are). Also i would have a very detailed look at any of the small print.... sorry am being very sceptical about any of these large scale schemes, they usually don't deliver for the individual but for the large company....
If you have the up-front money in the bank, it might just be a reasonable investment, given that the interest rate on savings is not going to improve any time soon, but I personally would not borrow money for a project like this.
My neighbours panels were covered in snow for about two weeks recently.... not much generated there. Since the snow melted we had quite grey, cloudy days, I am not sure if Scotland is in the right place in the world to generate lots of its energy from solar....
We built our house 4 years ago, and decided on an oil central heating system - because of cost mainly. We also have a multifuel stove in our big living area, and don't normally put the oil central heating on before the end of November and turn it off by March. We use about 1500ltrs of oil per year, this includes running the hot water system over summer. We are thinking about installing a hot water solar system for summer use, but haven't really got any finance for this....