 Complete the following phrase:  On 1 October 1932, 152 Heavy Battery at Seaton Delaval left to be converted into 152 Medium Battery in 55th Northumbrian Medium Brigade. Then on 1 April 1934 150 Heavy Battery at North Shields also left to be converted into 150 Medium Battery in 51st Midland Medium Brigade. However, on 10 December 1936 these two batteries left their new brigades and were converted again into 179 and 180 Tynemouth Anti-Aircraft batteries forming a new 64th Northumbrian Anti-Aircraft Brigade based at North Shields. This unit could therefore be considered an indirect offshoot of the Tynemouth Volunteer Artillery. It saw service in World War II during the Battle of Britain and the Newcastle Blitz, North Africa, Italy, 