Selling-up? Moving in? Or just aware that things are a bit old and unsafe?
Over time electrical installations become out dated and cables decay or become damaged reducing their ability to provide adequate protection. Before becoming dangerous you will need to re-wire all or part of your property at some stage, with modern equipment and to the current wiring regulations.
This will also incorporate additional fault protection which is now mandatory in certain locations and installations.
With careful planning and expert advice this does not have to be a daunting undertaking.