The US president said it was "another in a very long line of National Security reasons why Greenland has to be acquired".

The government said it expected schools to be "phone-free by default" as a result of the announcement.

Nearly a quarter of hospital trusts in England have seen waiting times deteriorate in the past year.

The government says the industry will have "nowhere to hide", but campaigners say the reforms do not go far enough.

Hedgehogs are surprisingly common in UK gardens, with food a powerful attraction, say scientists.

The phenomenon known as the Aurora Borealis is the result of solar eruptions sending particles that interact with the Earth's atmosphere.