Turn on all your cold taps to do this.
Switch off your central heating, immersion heater or any other water heating systems. If you use solid fuel, let this die out. Once it’s shut down, turn on the hot taps to drain the system.
Don't touch any wet electrical fittings such as lights, sockets or appliances. Switch off the electricity supply straight away and call an electrician.
If water’s been leaking for a while, it may have damaged your ceiling plaster. If you see a bulge in the ceiling, make a hole to release the plaster and water.
Your home policy may cover you for plumbing or heating emergencies; if it does, contact your insurer for assistance.
If you need to find a qualified plumbing and/or heating professional, take a look at the online search tool WaterSafe.
It’s always worth checking what insurance you have before an emergency occurs, If your plumbing and drainage isn’t protected, find out more about policies from HomeServe.