Ahh ok your tone came across as "if no one else on the forum gets them checked I won't either"
Sorry for misunderstanding.
I'm sure any gas registered plumber can pass it.
I'd be very interested to see what he has to say regarding ventilation etc.. Not that I am saying raving the door open inst enough, but rules and regs may mean a proper vented flue etc...
Darran
Interesting! The trouble is that the gas regs that govern catering vans say its needs to have adequate ventilation. What is adequate ventilation? Adequate is open to interpretation. I've seen a catering trailer with a gas safety certificate issued using an L5 gas boiler inside the kitchen area - no flue. But there was an extractor over the griddle area.
Gas is regulated in caravans, but there are no regulations that I can find that govern installed gas heaters in wfp vans. Common sense says that they should be ventilated outside through a roof vent, but you can't judge the safety of an item if there aren't any regulations. The same applies to roofers and plumbers. There is no regulation on how they are to secure and operate their equipment safely.
The trouble is that common sense to you may not be common sense to someone else.
I would be very surprised if a gas engineer would issue a certificate to a fitted gas appliance that isn't vented in an enclosed van, but then I still can't get my head around that catering trailer.
If staff are worried, then best they don't use it. Probably why diesel heaters are better with staff, although very expensive.