The Electrical Safety Council recommends that all domestic properties have an electrical inspection carried out every 10 years. Most properties have never had an inspection carried out and most likely they were wired prior to 2005 when the Building regulations were amended with Part P to require notification of changes to the electrical installation in your home to the Building Authority. This meant that anyone, regardless of their skill or training, could carry out electrical work, leading to many potentially dangerous modifications to electrical circuits in properties. Clearly this was and still is a dangerous state of affairs.
An Electrical Condition Report will give your property a full inspection and test of the electrical installation, think of it as a service for the electrical circuits . Pretty much the only area that cannot be inspected are how the cables are run in your walls and below floors, though there are a number of tests to check their condition.