Guidance for identifying possible cause(s) of; Difficulty restoring supply following power loss. Problems identifying cause of intermittent power loss. Establishing if you need to call for assistance to diagnose power loss; .
First you must verify if you have lost ‘all-power‘ or just partial power to one or more ‘individual-circuits‘. (If you have lost ‘all-power‘, double check if it’s just your property, or have the neighbours properties also lost power due to an external power cut?)
You also need to know the composition of your fuse box. What protective devices are fitted and if any have tripped off? The type of item that has tripped, defines the type of fault cause you are searching for. (1) Overload protection; ensures too much power cannot flow damaging a cable. (2) Shock protection; ensures that electricity has not leaked from a circuit, with the risk of someone touching a conductive live part. (3) Surge protection; ensures that external factors such as lighting strikes cannot damage sensitive expensive electronic devices. (4) Arc-Fault protection;
Historically fuse boxes only had overload protection, by wired fuses, possibly by traditional Wylex fuse holders, or earlier ceramic fuse holders. If your fuse box still uses this method of protection then it is lacking features modern fuse boxes provide to improve the level of protection. If a fuse-wire repeatedly blows following replacement then professional help to test the circuit may be needed, as cables could be damaged due to high fault currents..