Royal Navy patrol ships have tracked a fleet of Russian warships as they passed through the English Channel.
Portsmouth-based HMS Tyne, Severn and Mersey have been monitoring the seven Russian Federation navy vessels as they sailed close to the UK.
They also tracked a surfaced Algerian submarine as it travelled back to its north African home.
The Russian ships, viewed from astern, is pictured as it passed through the Dover Strait under the watch of the Royal Navy
HMS Mersey, pictured during the operation, kept track on the Russian ships and an Algerian submarine
HMS Mersey met up with a trio of vessels - frigate Admiral Kasatonov, a supporting tug Nikolay Chiker and tanker Vyazma - off Ushant in France and stayed with them through the Channel and Dover Strait and into the North Sea.
A Navy spokesman said: 'Her monitoring mission was made more challenging by adverse weather conditions such as high winds and large sea states which meant the Russian ships took longer than usual to pass through as they sheltered in more confined waters before resuming their journey.
'HMS Mersey's ship's company worked around the clock to ensure that the three Russian ships passed the area safely.'
Navigating officer Lieutenant Thomas Bees added: 'The Russian Federation naval vessels operated in a safe and professional manner throughout their transit.'
The HMS Tyne (pictured) worked with the HMS Mersey to keep watch on four Russian vessels sailing towards the Atlantic
A member of the crew from the patrol ship HMS Tyne keeps close watch on the Russian ships passing close to British waters
The HMS Tyne monitors the Russian task group passing in opposite direction through the Channel
The Tyne, pictured, was one of three Portsmouth-based patrol ships monitoring the presence of the Russian ships
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Before the Kasatonov group sailed through the Channel, Mersey worked with HMS Tyne to keep watch on four Russian vessels sailing through the Channel towards the Atlantic.
The Navy spokesman said: 'The quartet - three Ropucha-class amphibious ships capable of landing tanks, Minsk, Kaliningrad and Korolev, and the frigate Boiky - were located in the North Sea and closely followed through the Dover Strait and into the English Channel before reaching the open waters of the North Atlantic.
'As part of the operation, the Portsmouth-based offshore patrol ships worked with several allied Nato ships and aircraft to ensure the Russian force was observed seamlessly.'
Lieutenant Nicholas Ward, Tyne’s executive officer, added: “Once again HMS Tyne demonstrated the fantastic capability that the River-class ships provide.
'We have quickly switched from conducting fishery protection to working with our NATO allies monitoring foreign warships operating close to the UK. We’re all proud on Tyne to be part of the team protecting the nation’s interests.'
The Algerian submarine was tracked on the surface as it returned home to Africa by HMS Severn, which normally trains Royal Navy navigators.
Commander Philip Harper, Severn’s Commanding Officer said: 'It has been a pleasant duty to welcome our Algerian friends for their transit of UK waters in great weather as they head home.'
Last December the Royal Navy shadowed nine Russian warships around the UK.
The ships included a surfaced submarine, a destroyer and a patrol ship and were spotted in the English Channel, the Celtic Sea and the west coast of Scotland.
The surfaced Algerian submarine is pictured as it passes the Kent coast on its way back to north Africa