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The defence secretary earlier said that the bid to improve Ukraine's navy "marks the beginning of a new dedicated effort by the UK, Norway and our allies to strengthen Ukraine's maritime capabilities... enhancing their ability to operate in defending their sovereign waters and bolstering security in the Black Sea".

The provision of two Royal Navy minehunters to Ukraine has been in the works for a long time. They were part of a package of UK maritime support, promised before Russia invaded Ukraine.

The Royal Navy has been training Ukrainian crews over the summer in how to use the ships.

However, there are still questions as to how or when they will be able to enter the Black Sea - with Turkey controlling access through the Bosphorus.