Canberra

 was the headquarters for UNIT in Australia. UNIT (Canberra) once sent a package to UNIT (London} for confirmation of its contents' alien origins. The artefacts were related to the 1930s yacht, Constitution III, that met its end reasonably close to Australia. The third Doctor and Dr Liz Shaw confirmed the objects were alien soon after opening the package.

UNIT (Canberra) continued to supply UNIT (London) with assistance as the Doctor, the Brigadier, Liz, and Sergeants Yates and Benton investigated the origins of the artefacts further. (MA: The Eye of the Giant)