Martin Lewis on "Energy-saving tips 'n' tricks (and how we've answered 'em)"
www.moneysavingexpert.com/utilities/energy-saving-myths/
About putting things on standby, he says -
"But there's some debate about how effective this is – the Energy Saving Trust still says you can save about £40 a year by turning off your appliances at the plug, while British Gas says it could be £110 a year, but we reckon this figure is a bit overblown. It's EU law that TVs and other devices made since 2013 can't use more than 0.5 watts in standby mode. To show the scale of it, a TV watched four hours a day and left on standby the rest of the time would cost £1.03 a year.
While the report focused mainly on TVs, it is said that most modern devices consume much less power while on standby than they used to. So while you may not save as much as the Energy Saving Trust says, it can still be worth doing – all devices will still use a small amount of power, and this can add up."
I switch things right off when I can, as it is possible for something to go wrong and overheat, causing a fire. Plus, now we have left the EU, their safety rules may not keep out devices made since 2013 which use more than 0.5 watts in standby mode.