In article , AnthonyL
writes
The wife's underblanket is designed to be used all night if required.
It must be now 15yrs old. I regularly visually check it and there is
no fraying or sign of deterioration but I'm wondering if it would be
wise in any even to plug in via an RCD adapter.

Can't do any harm but be aware that the adaptor type products are IME
more prone to false trips when left on for extended periods
(weeks/months) than ones designed for consumer unit use so a trip may
not necessarily indicate a fault in the blanket.

--
fred
it's a ba-na-na . . . .