I call bullshit on this claim. Sure, you might be paying pennies a kWh, but likely only for a few hours at midnight, then it spikes to £0.50 during peak times.
Its a widely know, widely published tarrif. https://agileprices.co.uk/ - Make all the calls of whatever you please.
Its a widely know, widely published tarrif. https://agileprices.co.uk/ - Make all the calls of whatever you please.