Proof that using a dust sheet over your bed and removing all unnecessary furniture from rooms is a REALLY good idea whenever work is taking place overhead. Currently electrical wires are being laid in the floor cavity above – a stray foot not resting on a beam and it is quite easy to accidently boot out the plasterboard forming a ceiling in the room below. That’s what has happened here. The picture is hazy because of the dust! It looks bad but will be cleaned up in half hour.