Magnetic north and true north

True north is the direction you'd have to walk in to get directly to the North Pole. You'd be walking along a line of longitude. When a compass points north, it is being attracted to the south magnetic pole in the core of the Earth. As I understand it, this is due to the movement of iron in the core so that magnetic pole moves around. Most of the time, magnetic north and true north do not line up. Newspapers today were full of the excitement that they will line up along the Greenwich Meridian in the next couple of weeks - the first time this has happened since the Meridian was named https://www.theguardian.com/science/2019/aug/30/compasses-to-point-true-north-for-first-time-in-360-years Since Wigton is not on the Greenwich Meridian, it won't quite be happening here yet.