I did raise the issue of mastic around the awning rail, and the drain holes, and asked for this work to be checked before I picked up the van. I noted how it took you to clean yours, and didn't want to be sitting around on the day if the mastic need some attention.
Cameron noted my point, but also observed that there will always be some amount mastic seepage in a new van.

I think from the number of emails between me and AL over the last week, they will have got the message that I will be expecting a well presented 540!

AL to be fair to them, had offered to deliver the van at no cost up to Liverpool. Whilst a nice offer, I prefer to go and get it from them, and will stay at a campsite nearby for a couple of nights, should my lights start flashing in the middle of the night!!

Good luck with the move back up to Formby.

Cheers Mark

Add to list:
Slam the door a few times as if in normal use. Check that it does not lock you out.
The internal door handle can be sprung upwards into the lock position. This is a very awkward situation if your keys are inside!

Check the four corner steadies run smoothly.

Check the external water connector is not leaking when the pump is running.

Check the wheel nuts by removing the wheel trims ( steel wheels). Are there covers on the wheel nuts? Have they been deformed by excess heat?

Does the main door fit flush at top and bottom?

Carefully check the join of the interior aluminium roof trim just where your head may come into contact at the rear. Some vans have razor sharp edges just at head height!

Run all blinds and insect screens up and down a few times.

There will be more to examine!