Another John i.e. I myself wrote:

If it's 15 years old I'd change it anyway: I have just done exactly that
myself, being a big, B-I-I-G fan of electric blankets (as I've said in
another thread recently, my wife gets way too hot, so I just have a
single, on my side of the bed).

I got this one:
http://www.johnlewis.com/dreamland-6...electric-under
blanket/p231270114

BLOODY HELL!! I've just noticed that that item is FIFTEEN POUNDS less
than I paid, in the store, one month ago!!!! Maybe they've reduced
them because we're coming out of winter?

John