it would have been in the late 70's I remenber my sister and her best friend rented a house in Reading and there was the typical electric meter in it.
But what was most odd - and I still don't know how come - was when the elecricity ran out, the lights and power went as you would expect, but ... the TV would carry on working, albeit with no picture - you could continue listening to whatever you had been watching
(handy as you didn't miss anything while you looked for another 10p coin
).
my mum was on a bit of a tight budget generally and in the early 70's, not only did we rent a TV, but it was still black & white (fair enough at the time), plus it was a used model to save a bit of money AND was a portable size (12" or 14").
AllI can say is "kids these days ........"