The Royal Navy's billion-pound warship HMS Daring has been towed from its home base for a multimillion-pound engine refit which, with other maintenance, has left it stuck alongside for four years.
HMS Daring was watched by members of the public as it left HMNB Portsmouth for her journey to the Cammell Laird shipyard in Birkenhead, where the Power Improvement Project (PIP) upgrade will take place.
All six of the Type 45 destroyers are set to undergo the replacement of their power and propulsion systems which have failed in some of the ships in the class of vessels which the Navy has described as "state-of-the-art".
HMS Dauntless was the first of the Type 45 destroyers to undergo a PIP upgrade and is expected to return to sea for trials this year.
HMS Daring was last at sea in 2017 for patrols in the Gulf as part of Operation Kipion and her upgrade is expected to be completed by 2023.
During the deployment, she travelled 50,000 miles, visiting 12 countries and undertook 20 patrols of the Bab-al-Mandeb strait to reassure merchant vessels and keep the sea lanes open for trade.
In July 2021, HMS Defender, which was at the centre of a diplomatic row with Russia following a voyage off the Crimean peninsula, was the only vessel of the class without an issue.
The other five Type 45s were alongside for planned maintenance or because of problems they developed at sea.
In July, HMS Diamond experienced some technical issues and detached from the Carrier Strike Group 21 (CSG21) for "maintenance, inspection and any necessary repairs".
She has since returned to sea after six weeks to rejoin HMS Defender and the CSG21 after undergoing the repairs she required.
Watch: Royal Navy's Type 45s – only one of six destroyers "operationally available".