A Russian warship was tracked by the Royal Navy as it passed through the English Channel, the Ministry of Defence (MoD) has said. Yaroslav Mudry and its accompanying tanker, the Kola, were sailing back to Russia after a deployment in the Mediterranean.
Reports suggest the Russian frigate's homeport is Baltiysk. British warship HMS Argyll, based in Plymouth, Devon, was deployed and used its Lynx helicopter and sensors to locate and monitor the movement of the Russian ships off the coast of France and through the English Channel.
The MoD said the Royal Navy took over from French surveillance, in line with the Nato agreement, and described the operation as "pretty routine".
Commander Paul Hammond, commanding officer of HMS Argyll, said: "We are one of the Royal Navy's high readiness ships and we knew we could be called upon to respond to a range of duties, such as monitoring a Russian warship, at short notice.
"The vast majority of the ship's company, myself included, returned from a highly successful deployment just before Christmas. To be ready to undertake this duty after a short period of leave and maintenance is a testimony to their hard work and the capability of this ship."
HMS Argyll is the longest-serving Type 23 frigate in the Royal Navy. The tracking took place on Sunday and Monday, said the MoD.
In January, the Russian ambassador was summoned after two Russian Tu-95 "Bears" flew close to British airspace, forcing jets from the Royal Air Force to intercept the aircraft over the English Channel.
According to the Ministry of Defence, that incident was the latest in a series of Russian maneuvers in which planes have flown close to NATO members’ territory.
Tensions between Russia and NATO nations have been high amid fighting between Ukrainian government troops and Russia-backed rebels in eastern Ukraine. NATO said its pilots conducted more than three times as many intercepts of Russian planes in 2014 as the year before.
The following images provided by the MoD are of two Russian surveillance planes that were detected off the coast of Scotland in April 2014.