Rang the DNO yesterday to ask what is happening, lady took a message & said that somebody would get back to me in a couple of days, had the call this morning, it is going via G99 & that they have 9 working weeks or 45 working days to respond to any application. The due date is the 16th November, but he expects to make a decision on Monday, he says a quick scan at the maps doesn't bring any red flags, but he has to do some calculations before he can confirm any decision. He also advised there is also a matter of a £365+vat fee to be paid which will be billed to the installer.
At least I know whats happening, I would have been okay with it, if the installer had advised this was the case, as it is I've worked all of this out myself reading on here & FB, but potentially the light is at the end of the tunnel.