Watch as HMS Somerset shadows a Russian submarine as it passed through the English Channel.
The Plymouth-based ship located the Kilo-class diesel-electric submarine Krasnodar in the early hours of Friday morning as it sailed past the eastern coast of the UK.
HMS Somerset, a Type 23 frigate, then followed her through the Dover Strait and the rest of the English Channel over the weekend.
Commander Tim Berry, the Commanding Officer of HMS Somerset, said:
“Policing the sea both in home waters and further afield is core business for the Royal Navy.Escorting foreign warships, in this case a Russian submarine, through UK waters is just part of our ongoing effort to protect our island nation.”