"Putting the ships off the coast of Ukraine is intended to show solidarity with Kiev and Nato allies in the region after the President Biden decided to cancel the deployment of two American warships to the Black Sea last week for fear of escalating the crisis over the massing of Russian troops," The Sunday Times wrote.
Biden had canceled the US warship deployment after a phone call with Russia's Putin, wherein the US president also expressed willingness for a face-to-face summit at some point in the summer - an overture that angered hawks, given it put the White House in a "weak" position due to no conditions being agreed to ahead of such a high level bilateral summit
According to further details in The Sunday Times:
One Type 45 destroyer armed with anti-aircraft missiles and an anti-submarine Type 23 frigate will peel off from the Royal Navy's carrier task group in the Mediterranean and head through the Bosphorus into the Black Sea, according to senior naval sources.
RAF F-35B Lightning stealth jets and Merlin submarine-hunting helicopters are to stand ready on the task group's flag ship, the carrier HMS Queen Elizabeth, to support the warships in the Black Sea should they be threatened by Russian warships, submarines or aircraft. HMS Queen Elizabeth has to stay in the Mediterranean because an international treaty prohibits aircraft carriers from entering the Black Sea.