You can find out roughly how old your wiring is by simply looking at it. If the wiring around your fuse box is covered in old-fashioned casing, or is damaged or fraid, it may be over 25 years old and need replacing. This is more common in older properties or houses that have been empty for long periods of time.
Isle Of Mull
The Isle of Mull or simply Mull is the second-largest island of the Inner Hebrides (after Skye) and also lies off the west coast of Scotland in the council area of Argyll and Bute. With an area of 875.35 square kilometres (337.97 sq mi), Mull is the fourth-largest Scottish island and the fourth-largest island surrounding Great Britain (leaving out Ireland). In the 2011 census the usual resident population of Mull was 2,800, which was a small rise on the 2001 number of 2,667. In the summer season the population is supplemented by many travelers. Much of the population lives in Tobermory, the only burgh on the island till 1973 and also its capital. Tobermory is also residence to Mull's only single malt Scotch whisky distillery, Tobermory distillery (previously Ledaig).
