I can’t say off the top of my head, but there is a BS standard for smoke detectors etc in static caravans. All the new ones we got had the same as a house. Hard wired interlinked, smokes in hallway and lounge (if separate room to kitchen), heat in kitchen and carbon monoxide wherever the boiler was.
It’s just that they’re not following the new Scottish rules, as they’re not classed as a house in their definitions, but they will have fire detection fitted in the factory. (Under their own standards)
When I worked on a park, the fire safety was that caravans had to be a certain distance apart… (6m comes to mind) which was an increase of a previous regulation of 5 and a bit… so many parks had caravans too close together and had a number of years to alter their layout to comply.
Another rule was not to store anything under their decking. We had one fire where the owner had a ciggy outside, dropped the butt which fell through the gap between boards and started smouldering on some scrap timber leftover from building the deck. There was also paint, antifreeze, other outside cleaning equipment all underneath.