No.
In the UK, ship detention is a measure that may be used by specified persons (as stated in the previous answer) when the ship is in contravention of a requirement of a piece of legislation which specifically sanctions detention, whereas arrest is apprehension of a ship on the order of a civil court having admiralty jurisdiction, in order to secure a maritime claim against the ship. The MCA issues a Detention Notice when detaining a ship. A British court must issue an in rem claim form and a warrant of arrest to the Admiralty Marshal before arresting a ship.
