A Royal Navy warship has been scrambled to shadow a Russian spy ship travelling through the English Channel.
HMS Diamond and a Wildcat helicopter were dispatched to follow the underwater reconnaissance ship Yantar after it approached the UK coast.
Portsmouth-based Type 45 destroyer and the helicopter from 815 Naval Air Squadron at RNAS Yeovilton have been monitoring the Russian Navy ship as it travels north through the English Channel.
A Navy spokesman said: “HMS Diamond met up with Yantar and will continue to monitor the vessel's movements and activities as it continues north.”
Commander Ben Keith, commanding officer of the Type 45 destroyer, said: “HMS Diamond is proud to be doing her part to protect the UK area of interest by monitoring the Russian vessel Yantar on her transit. This is routine business for the Royal Navy.”
He said the Russian vessel is a specialist reconnaissance ship which carries two unmanned submersible vehicles, which can descend to the sea bed and send back images as well as collecting items from the bottom of the ocean.
Defence Secretary Gavin Williamson said: “We will not hesitate in defending our waters or tolerate any form of aggression.
“Britain will never be intimidated when it comes to protecting our country, our people, and our national interests.”
HMS Diamond left Portsmouth in thick fog on Wednesday to meet the Russian vessel, which had earlier been monitored by a French Navy ship through the Bay of Biscay.