85th (Tees) Heavy Anti-Aircraft Regiment, Royal Artillery was a part-time unit of Britain's Territorial Army (TA) formed from forces around the river Tees just before the outbreak of World War II. Its service during the war included the Battle of France and Dunkirk evacuation, the Battle of Britain and Blitz, and the North African and Italian campaigns. It continued to serve in the air defence role until 1961.

43rd Anti-Aircraft Brigade was an air defence formation of Britain's Territorial Army (TA). Formed in 1938, it was responsible for protecting Teesside in North East England during the early part of the Second World War, and later defended South East England from V-1 flying bombs. It was reformed postwar and survived under different titles until 1961.