Donald Trump backed down from his threats on Greenland because the UK stood up for the Danish territory's sovereignty, David Lammy has told the BBC.

The deputy prime minster told Nick Robinson's Political Thinking that the US president had "responded to our concerns" in dropping threats to use force or trade sanctions to take control of the island.

He added that European counties were "now back where we wanted to be, which is a negotiation, effectively".

But he added that Trump was still determined for the US to "play a bigger role" in Arctic regional security, amid increased Russian activity in the region.

Trump abandoned threats to use military force to take control of Greenland on Wednesday, backing away from a position that had threatened to bring relations with Denmark and other Nato allies to a new low.