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Type 23 frigate HMS Somerset and minehunter HMS Cattistock, along with RFA Tidesurge and Navy helicopters, monitored and reported every move of the four Russian vessels as they passed through the English Channel and the North Sea .

The Udaloy-class Severomorsk then met the cargo and landing ships in the western reaches of the Channel, off Cornwall, where minehunter HMS Cattistock was already monitoring the Russian group.

Royal Navy patrol boats HMS Trumpeter and HMS Dasher followed behind, along with sea cadet training vessel TS Royalist and minehunter HMS Cattistock.

The Royal Navy will transfer two of its minehunter ships to Ukraine in a bid to strengthen the country's sea abilities, the Ministry of Defence has said.

The Royal Navy are helping them operate Sandown Class Minehunter vessels, ahead of the sale of two such vessels in a deal agreed last year.