You cannot see electricity, usually cables are hidden, and consumer units can be hidden in cupboards, so its common for the condition of our electrical installations to go unnoticed.
Faulty and old wiring is one of the number one causes of electrical fires in the home. You can reduce the risk of a fire by checking the condition of your cables, switches, sockets, and other accessories regularly, by having an Electrical Installation Condition Report (historically known as a Period Inspection & Test) carried out by professionals with the necessary qualifications & experience to identify any issues that may be present. The frequency of the inspections will depend on many factors and will be recommended by the inspector as part of the report. Private Landlords must have an inspection every 5 years as a minimum.