The electrician will check that your fuse board is safe and compliant with the current regulations. This means whether it has the necessary circuit breakers and RCD protection. Other checks designed to prevent fatal electric shocks include ensuring that everything is correctly earthed. Your electrician will check this on your gas-meter pipework, water pipework, radiators, and all the metal in the building. They will also check your sockets, lights, switches, and accessories to see that the wiring is installed correctly. Portable appliances are not included in an EICR. This involves a separate test.
Some companies will only test a sample (10%), whilst Pimlico will test 85 – 100% of your electrics.