Much has been said about the idea of 'signal leaving UK or EU'. Little has been said about how exactly that would happen.
AFAIK, Signal has no business presence in the UK or EU. IE, no offices, no registered corporate entities. Thus, they (arguably) have no more requirement to comply with UK's or EU's regulations than, say, Iran's or China's or any other jurisdiction where they do not do business and have no presence.
Signal's leadership has a record of giving any regional restrictions the middle finger, so I doubt Signal would voluntarily block EU countries. So that means the EU would either pressure Google and Apple to delist Signal (easily worked around, at least on Android, and soon on Apple too as EU is trying to force sideloading) or they'd pressure ISPs to block connections to Signal (more or less impossible).
If EU tried to do that, it'd just create a giant game of whack-a-mole. And people doing real CSAM shit would just move to even more private distributed systems.
Gas stoves rock. Rather than banning gas stoves, just require that they be installed safely.
The answer here is simple- mandate a range hood with real outside exhaust (not the cheap ones that blow air back into the room). And require a make-up air vent with equivalent capacity.
Maybe require the stove to automatically engage the vent at low speed (near-silent) so when you start a burner the vent runs at like 10CFM or something automatically.