If you want super-fast Wi-Fi in your home, you may want to turn off your Christmas lights.
CNN Money 12/01/2015
"Britain's communications regulator Ofcom has published a report showing that about 20% of poor Wi-Fi performance is caused by electronic gadgets and lights in the home."
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I know in my own house, WiFi pretty much dies when the microwave is running, and I can only imagine what cheap Christmas lights would do! At this time of year, with the lights and all sorts of new gadgets coming into the home, remember that if your WiFi suddenly has major issues to check what all is on and running that might be the cause.