Bit of a strange question

DH says " Could it be a battery running out in something ?

Have you an alarm accidently set on your phone or alarm clock or cooker ?

Smoke alarm battery running out?

Yes, sounds just like smoke alarm battery.

Smoke alarms usually pip quite loudly when they run down
As it’s muted could it be coming from next door provided you have a next door of course

Indeed - something has run out of battery. I know how annoying it is traipsing about the house trying to find which one it is! The noise does not happen where you are standing!

Carbon monoxide detector?

But when my battery things run out they don’t normally wait exactly an hour to pip

Thank you all. At the moment all is quiet, battery run down? We didn't discover what was making the noise, but searched high and low. It seemed to be coming from the area around the cupboard where the boiler is sited. But it is still a mystery. Just hope it doesn't come back.

have you checked the boiler pressure?

Farview, thanks, yes I did check the display panel and all seemed well. Fingers crossed we haven't heard any more strange noises, fingers crossed.

If it's in or near your boiler cupboard have you a carbon monoxide detector it might be that.