Someone is up early on the Saturday before Christmas!
Depending on who your accreditation body is, being a GD installer is easy. I just had to show paperwork in order. My DEA is now also a registered GDA.
This has cost me nothing. As in my opinion the GD has major flaws which will severely limit implementation, this is the extent of current involvement.
I suspect that there is even division in DECC over its efficacy. Some policy you may expect to be linked in to it, may be configured in such a way as to be able to operate in conjunction and independently so it will not fail if the GD stalls.
(sent from my iPhone whilst still in bed)