OP
GaryM
Personally Id get it signed off by another installer and cancel your inspection while you can. Im sure plenty here would do it for you.
Does the FiT certificate need to be sent with an invoice to your energy supplier?
Is so, would they need to come from the same company?
I'm also in a predicament in that the guy I work for and I both completed our C&G2399 this past week and were due to carry out a 4kWp install on my house as a first install in readiness for an MCS assessment from Elecsa who also we're also with for Part P. It seems Elecsa are running at 4-6 weeks for an assessment so an install for me isn't looking too likely now