HMS Forester was one of nine F-class destroyers built for the Royal Navy during the early 1930s. Although assigned to the Home Fleet upon completion, the ship was attached to the Mediterranean Fleet in 1935–36 during the Abyssinia Crisis. A few weeks after the start of World War II in September 1939, she helped to sink one German submarine and then participated in the Second Battle of Narvik during the Norwegian Campaign of 1940. Forester was sent to Gibraltar in mid-1940 and formed part of Force H where she participated in the attack on the Vichy French ships at Mers-el-Kébir and the Battle of Dakar between escorting the aircraft carriers of Force H as they flew off aircraft for Malta and covering convoys resupplying and reinforcing the island until late 1941. During this time the ship helped to sink another German submarine.

Operation White was a British attempt to deliver fourteen aircraft, twelve Hawker Hurricane fighters and two Blackburn Skua dive bombers, to Malta from the aircraft carrier HMS Argus. White was one of what became known as Club Runs, that supplied fighters for the defence of Malta.