It’s all confusion ?? B & Q has closed their stores. Wickes have closed today for 24 hours to “clarify” the situation 
Oh heck!!! My son texted a couple of hours ago to say the en-suite has a leak somewhere - even the flooring in the bedroom is lifting & is sodden underneath.
We can't help due to the lock-down, son is clueless, and it looks like B&Q is shut. Panic is rising!
Hi Jomot
Don't panic and turn off the main stop tap (some are under the kitchen sink or downstairs cupboard etc.)
Secondly try and trace where the water is coming from. Sometimes it can be just a toilet cistern (tank with the flush handle / button on it) overflowing and the overflow pipes are often just push fit (with no seals).
If you can trace the leak to a bathroom appliance (basin / toilet cistern), modern bathrooms often have a valve (pictured) in the inlet pipework (pictured in ON position), some get stiff, but if you can get a screw driver that fits the slot nicely (don't chew it up), then turn the slot 90 degrees (if it will turn easily), so that slot goes across the direction of flow. Added: The main Stop Valve (stop tap) is different to the picture.
Before I mess with anything, know where your main house stop tap (should be one at the Water Meter, if you have one) is first and that it will work and turn off the water.
If he has a main bathroom, stop using the En-suite with the leak, as it could be a leaky waste pipe and might stop leaking if you stop using it (until you can get there to investigate further).
Switch off any electrical appliance immediately near the leak. If electricals are wet or affected with water dripping and you can't get close or the Switch or electricals might be covered with water, then switch off Electrics at the main Consumer Unit, Fuse Box first.
Added: If absolutely hopeless at DIY, it sounds like you'll need a Plumber. In 13 years as a Qualified Plumber there are a few people who are not mechanically minded at all and can make a simple matter much worse.
A leak from a Gas Boiler, everyone needs a Registered Gas Engineer.
Some appliances may need turning off, so a good idea for all households to keep all the Instructions in one Folder, when you have something fitted.
It is amazing that 1000s don't know where there Stop Valves are!
Mark
