Always remember, although it is your property but it’s someone else’s home.
Landlords are responsible for the electrical safety of any property you let from the start of the tenancy. Good practice is to complete visual hazard checks to ensure all appliances are non hazardous. Burn marks around sockets and plugs, sparks emitting from appliances and exposed wires are examples that you must look out for when carrying out a visual hazard check, anything noted should be dealt with by a qualified professional.
If the property you are letting is a HMO (House of Multiple Occupation) you must have a periodic inspection carried out by a qualified electrician once every 5 years. If you are letting a property that is not a HMO you are under no legal requirement to have an inspection