What electrical devices do I have to unplug, and what about Wi-Fi equipment?

Lamps, CPAP devices, cordless landline phones that date from 2019 onwards (and older DECT and IDECT phones), white noise machines and some fans and heaters are OK. Anything with a sizeable motor, transformer, or clock function, will not be. That includes alarm clocks, radios, computers, electric blankets and phone chargers. Battery powered devices are OK. Use your phone in airplane mode as an alarm if useful. Your router is OK provided that it (and any booster boxes) is more than 7m away. Otherwise switch it off overnight.

Turn off your router if you have an Alexa, Amazon Echo, smart plugs or
smart lights in your bedroom. If you can’t turn off the router, this must be disconnected or put on a timer. Neighbour's’ Wi-Fi is rarely a problem.