If water gets onto the ABS tray it will drip down from the heater duct into the cab when the van is parked uphill. This is the reason I removed the shelf.
The windscreen seal was replaced by National Windscreens 5 years ago so if it’s a leak I will ask them to reseal it before I replace the shelf. It hasn’t rained since I started this job.
I was worried that the MOT is due in May and that I would have to get everything back together before then but I may have some leeway with the virus allowing a 6 moth stay of MOT.
Tom