Compasses to point true north for first time in 360 years

Over the past few hundred years in the UK all compass needles have pointed west of true north

At some point over the next two weeks, compasses at Greenwich will point true north for the first time in about 360 years.

And for some parts of the UK, this may not happen for another 20 years. Either way, it is a once-in-a-lifetime event.