Mould and damp in rented accommodation is an increasingly reported issue and also a hot topic in the upcoming renters reform bill.
Normally mould and damp is caused by condensation and a lack of ventilation rather than structural issues with the property. There are several steps that tenants can do to help reduce condensation and the resulting mould.
Try to avoid dring laundry inside, if you have to then try to do it in teh bathroom with the door closed and the extractor fans on.
Ensure tumble driers are vented to the outside.
Keep trickle vents open at all times or alternatively open small windows.
close the bathroom door when in use
Ask the landlord to provide a dehumidifier if the problem persists
Allow space for the air to circulate, try to leave a gap between the wall and any furniture.
In cold weather keep the heating on low all day rather than have it very hot for a short period of time.
Do not excessivly heat your house, the hotter it is the more condesation will be produced during the colder months. Reach for a jumper instead, this will also keep your heating costs down.