OP
Somecamel
More or less tempted to say sod this and wait for April when the madness subsides and I know its 21p, the problem is with roof space for ~4KW system - projection over 25 years is massive difference for 21p to 43p. If I could be sure I was not getting done on the panel price, and able to get a well experienced and stable installer I would just order now as normal.
We don't know what the Tariff rate will be Post April 2012