British nuclear tests at Maralinga

Between 1956 and 1963, the United Kingdom conducted seven nuclear tests at the Maralinga site in South Australia, part of the Woomera Prohibited Area about 800 kilometres (500 mi) north west of Adelaide. Two major test series were conducted: Operation Buffalo in 1956 and Operation Antler the following year.

Source: Wikipedia — British nuclear tests at Maralinga (CC BY-SA 4.0)