Having recently bought an older caravan after twenty years of using a motorhome I was surprised to find that none of the gas appliances had it's own isolating tap.
Surely, common sense states that if one appliance needs to be serviced all of the others - cooker, oven, fridge, water heater - should still be available for use.
This omission by the manufacturers (Caravans Intwernational) has now been rectified.
Colyn.