I connected the water inlet up today and did a test. I am pleased to say no leaks and the air transfer as the tanks filled worked fine.
You can see the water level, but it would be handy to a small red ball floating in the tube. I am open to suggestions on this as I can't think of anything that fits the bill. It needs to be about the size of a pea or slightly bigger. The tube ID is 16mm so I would say 10-12 mm would be ideal.
I also made the flue connection for the fridge, wired up and tested it on 12v. It works, so I know its good on 240v and 12v, just the gas to go. Fingers crossed.
I have also done a few other small jobs. I had to buy 2 x extensions to get the Turbo vent to open and shut, Link this meant I could put the fly screen on and this finished the installation, I put the lock barrel in the toilet door, cut the worktop for the cupboard on the N/S of the MH, put the backs in the 2 base cupboards. Its now making it feel like things are moving on.