FFS just drop it and let everybody get on with it at 21p. It's gone past the point of doing any good other than saying 'we were right and DECC are wrong'
Financially it is of little or no benefit to even the big companies involved, HomeSun etc as by the time its all been resolved, april will be so close, there won't be enough time to mobilise work forces to make the most of a higher tariff.
Most of this is a browny point operation to show the investors in such big companies (banks and similar) that they are fighting their corner, and not letting the investments go down the pan. This no longer has anything to do with 'the solar industry' it is purely for self gain.
After all of that, DECC will not stand down from this without the last laugh, and I have seen figures of as little as 9p floating around, which will be catastrophic for even the big rent a roof companies.
Just drop the case, take it on the chin and try and hope DECC can at least learn off this all, and try and work with us, otherwise come April we will most definitely be working against each other, if we are even working at all!