Consumer Unit Change
Many households are still powered via old-fashioned fuse boards. In the event of a fault you could end up fiddling about in the dark with fuse wire.
Even boards fitted in recent years can turn off all the power rather than just the circuit under fault.
Modern consumer units mean that in the event of a problem the power in the faulty circuit will cut out in milli-seconds, greatly enhancing the safety of you and your family.
A consumer unit upgrade on a typical 2 bed flat could be as little as £350, depending on your requirements.