Well, on our 2nd outing and something else has cropped up.
Just had the van serviced hob worked fine last 3 nights, tonight both hobs lit but the flame is really low when full on. Gas running out says I, changed over to new full bottle (propane) and still the same problem. Any thoughts?
The stir fry was very crunchy to say the least!
Thank you

Thanks Colin, rooting about in the locker I found a black threaded cap, it was apparent where it had come from so I have screwed it back into place. Also I find after trawling t'interweb there is a yellow button which can be pressed to reset the reg. Will have a fiddle in the morning in the light

Had a play around this morning couldn't find this fabled yellow button, now no gas to any appliance, looks like you are correct Colin, thank you. Now to see if we can get somebody out to us next stop Winchester for 2 nights so fingers crossed.
Failing that it's Halfords for a small camping stove seeing as how we forgot to put the Remoska in!

Correct Colin I have one of those hoses but the hose in use is just the old style hose and connectors.
I have booked a local engineer for when ee get home and speaking to him tonight he echoed John E opinion of the type of regulator fitted!
We will be eating out for our last 2 days before we get home

I've heard about regulator issues for many years, but never had a problem. After every use, I turn off the cylinder and run the hob until the gas runs out. Then I do it again once home, surprisingly, the hob will ignite for a few seconds.
I do this after every use and have never had issues.