Low risk
Leave them alone and call the National Bat Helpline on 0345 1300 228. Bats and their roosts are legally protected, whether or not the bats are in at the time.
Do not touch it with bare hands. Keep people and pets out of the room and call the National Bat Helpline on 0345 1300 228.
Caution
Rats and mice are most active at night and make scratching and scrabbling noises. Look for droppings and gnawing, but if bats are possible call the National Bat Helpline before doing anything.
A strong rotten smell that is worst in one spot is usually a dead mouse or rat in a wall, floor or loft. Find it and remove it, because the smell fades only as the body dries out.
Close the toilet lid and the door, keep children and pets away and call your council or a pest controller. Do not flush it or try to remove it yourself.
Winged ants leaving a nest to mate are harmless and short-lived. Open the windows, vacuum them up and look for the nest only if they keep coming from the same spot indoors.
They are harmless sluggish flies that hibernate in lofts and wake on mild days. They are not a sign of poor hygiene, and they often return to the same house every year.
Describe the job and get a fixed price from a local pest controller.