Out of interest, which provider did you pay? (Technically you've already placed an order at this point, but have the option to withdraw by forfeiting your £250+VAT)
We paid for the survey through Amvia, they seemed to be the most engaging at the time when I was looking around, nothing against the others. This was paid a week or so ago, but the desktop quote from fluid just came out of the blue today.
I don’t have an issue paying for someone to come out and survey as it will at least put my mind to rest knowing it is feasible or not.