Reported in today's papers as an example of time wasting 999 calls.
'Police Emergency, what is your problem please?'
'Yeah , well, there's this big light, see, over by the mountain, and it's been there half an hour and it isn't moving!'
' Is the light on the ground or in the sky?'
'In the sky, it may not be important, but it isn't moving, see. Could you send someone to have a look at it!'
'Hello, Foxtrot Delta , could you investigate a bright light in the region of.........'
'Roger, despatch, it's the moon!'

FC