Portable Appliance Testing (PAT) is the checking of the safety of portable (as opposed to fixed) electrical appliances in your property. Confusingly, portable appliances include stationary equipment like fridges and washing machines, as well as things like TVs, kettles and space heaters.
Getting these appliance tested with a PAT is a great way to ensure and prove their safety, allowing you to efficiently fulfil your duties as a landlord.