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 Iona
Iona is a little island in the Inner Hebrides off the Ross of Mull on the western coast of Scotland. It is mostly understood for Iona Abbey, though there are other buildings on the island. Iona Abbey was a centre of Gaelic monasticism for three centuries and is today understood for its loved one peace as well as natural surroundings. It is a visitor destination and also a place for spiritual retreats. Its modern Scottish Gaelic name implies "Iona of (Saint) Columba" (previously anglicised "Icolmkill"). The island, apart from the land owned by the Iona Cathedral Trust, was purchased from the Duke of Argyll by Hugh Fraser in 1979 as well as contributed to the National Trust for Scotland. In 2001 Iona's population was 125 and by the time of the 2011 census this had actually grown to 177 common homeowners.