Thanks to everyone for the feedback, we have a few quotes coming in now and the project is starting to come together.
Yes, cooling MUCH more important than heating as the OAT is over 40c for most of the year and only down to the low teens in the "Winter"..........
Tom, yes it's for the new one which is slightly less titchy.
Oh and the current one is still bigger than when you first showed me yours lol ............