The extinguisher — only if the fire is small and the exit is behind you
Pull the pin · aim at the base of the fire, not the flames · squeeze the handle · sweep side to side.
Burning oil or fat: never water. Water spreads the fire. Cover the pan with a lid and turn off the gas. Same for electrical appliances — unplug first, if you can do that safely.
Burns
Hold the area under cool running water for 20 minutes. The sooner the better — but it still helps if started up to 3 hours later. No ice, no creams, no ointments. Don't break blisters. Cover with a clean cloth afterwards.
If someone isn't breathing
Call 112 and let the operator guide you. They'll walk you through it step by step on the phone until help arrives.
Once you're out
Stay in a safe place, away from the building, and count everyone. Wait for the fire service and tell them if anyone is missing. Don't go back in until they say it's safe.