LONDON (Reuters) - Britain's Royal Navy said in a statement on Thursday that its warships and patrol aircraft tracked a series of Russian vessels close to its waters in what it called "a concerted monitoring operation".
The Royal Navy said submarine hunting frigates and P8 Poseidon patrol aircraft monitored movements of the Russian Navy in the Channel, North Sea and North Atlantic, without specifying when the operation had taken place.
The Russian vessels included corvettes Boikiy and Grad, cruiser Marshal Ustinov, the Udaloy-class destroyer Severomorsk, as well as others, according to the statement.
Britain is a key defence supplier for Ukraine and Russia has condemned the help Britain has provided to Kyiv.
The Royal Navy routinely tracks the movements of Russian warships sailing near its waters.
(Reporting by Muvija M, writing by Sarah Young; editing by Michael Holden)