gas safety

Personally I'd get the van serviced by a qualified caravan service engineer. I'd ask him to give me a list of all the faults and take that and your original receipt showing that "yes a gas check had been done" to Trading Standards they should be able to help you.
I'd also get a carbon monoxide detector fitted.

As above. I'm also a bit suspicious of them want you to to take back the van so quickly and them not wanting to involve a third party. As you are a member I would call the club's technical helpline and see what they say too.

I had a bad experience with my former dealer/service when they had not reconnected the hose from the cylinder to the van's inlet regulator. Luckily I noticed it before putting stuff back in the locker. Again they were most apologetic and offered me a free service.

Thanks for info/advice,  van has been to an independent service/repair centre who have listed/confirmed all the faults in my original post , the dealer concerned is not forthcoming with the number of the gas safe engineer who is supposed to have done the relevant checks so it looking like no such "qualified" check was done despite what the paperwork says. I will be seeking advice from Trading Standards on Monday . Many thanks

Veej

As far as I know, the regulations that apply to domestic gas installations do not apply to touring caravans, so all that is required is that work is done by a "competant person".

Fridges in caravans are often not correctly installed, sometomes even on brand new vans.

Our dealer changes the gas hoses if they are out of date at a service, others may just advise that they should be changed.

Yes, get a carbon monoxide detector.

Exactly so, Kjell. The requirement is for the person to be competent in order to work on caravan gas systems. It has nothing to do with Gas Safe regs intended for domestic or commercial premises, and is not the same as regs for hire vans. I have supplied links in earlier threads. 

The vague 'competent' description is a reason dealers send vans out the door in shoddy condition. One person's idea of competent is another's of incompetent as standards vary considerably.

just out of interest does the same apply to electrical work?

In a nutshell, Corners, yes. Another job for the competent.

wow, thanks

An Independent engineer told me that he constantly has problems with gas appliances after services by many main dealers.  This applies mainly to fridges due to the difficulties in keep taking them out and reinstalling, so a lot don't even bother.  I find that quite worrying. 

Servicing gas appliances is not part of the general service and so fridges will not be taken out unless requested.