Gas in France
We had the exact same problem in February. Witzend suggested we go to Intermarche. We bought the bottle and pig tail regulator. I have a double system on mine ( 2 bottles) which looks like yours. Their pig tail fitted straight on without any problems. Total cost bottle and pig tails was 45 euros, more or less. The bottle we bought was the cream coloured Intermarche bottle and we paid the 1 euro deposit , we even put an english address on the contract. Really simple. Tested it with washing up liquid to make sure there was no leaks. Do whach out as there are two fibre washers, one at each end of the system , make sure you don't lose them. Their gas is actually cheaper than england, although it is only a 10 kilo bottle. In future we will have an emergency 12 english but will run soley on the French bottle. There are far more Intermarches in little counrty villages than there are the big ones like Leclerc for example. We listed to Witzend, top man knows what he is talking about.
PJ