A recent new member so I was quite interested to read this thread and after some thought, these are my responses.
On Feb 15th I ordered 16 Panels, had them installed on the 29th Feb, got the higher rate. The thing was I was not expecting them to be able to install so quickly and thought I would get the lower rate of 21p.. the contractor said the bottom fell out of the market due to the Governments Policy of not giving away tax-payers money.... and this is the point, even if I was not getting any FIT, I would have installed them as it still makes a huge difference to the Energy Bill on my home....
To give you an example, 2012 has been the worst weather for years, hardly any sunshine at all, yet in the first 2 quarters, I halved my electric bill and obtained a fraction under £1,000 - can't wait for a decent bit of weather.
I don't believe the Government were wrong lowering the tarrif, this is TAX PAYERS money they are giving away when I would rather they just reduce the GREEN TAX on energy to reduce peoples bills...