//// Could you possible move from your damp dwelling? ////
Haha .... it's def not damp. We've just bought new furniture and the old hi-fi unit hasn't been moved in aaaaages and there are patches of mildew directly behind the unit.
//// but you might be lucky and have a USB output somewhere close to where you want the fan. ////
..... you've just given me an idea Hymie and for that, I shall award you with BA :)
I'm going to replace one of the plug sockets behind the unit with something like this:
https://www.screwfix.com/p/british-general-13a-2g-sp-switched-socket-3-1a-2g-usb-charger-white/8529p#_=p
I changed one of the sockets in the kitchen with one of these a while ago, so I'm surprised I didn't think of it earlier. I'd looked at these fans that plug into USB sockets but didn't consider them, so at least now I can have another look and consider the ones that plug into a USB socket :)