Black mouldy stuff has appeared on the bathroom ceiling

[Saltire]

and around the DSes bedroom window frames (UPVc). Whats the best way to get rid of it?

some sort of bleachy but try washing normally first. is it coming from your loft?

I have no idea where it's coming from. its a married quarter, and doesn't have a loft as such, just a "roof space" as they like to call it

get someone to check it out if you can

DETTOL - MOULD & MILDEW REMOVER spray will sort it out for you , dh put this on our bathroom ceiling last year & the mould never came back .

Sorry I didn't get back to this.
We have an extractor type thing in ceiling which goes on automaticaly when shower is on (although can be switched onand off manually too) and the windows are open