HMS Wellington, is a "Grimsby"-class sloop, formerly of the Royal Navy, now moored alongside the Victoria Embankment, at Temple Pier, on which river that flows through southern England?
HMS Wellington (U65):  She is now moored alongside the Victoria Embankment, at Temple Pier, on the River Thames in London, England, as the headquarters ship of the Honourable Company of Master Mariners, where she is known as HQS Wellington". River Thames: The River Thames ( ) is a river that flows through southern England, most notably through London.
River Thames