The 64th (Northumbrian) Heavy Anti-Aircraft Regiment, Royal Artillery, was an air defence unit of Britain's Territorial Army (TA) formed on Tyneside during the 1930s.

After defending the UK during the Battle of Britain and the Blitz early in World War II, it went on to see service in North Africa, Italy, Yugoslavia and Germany.

[2][3][5][6] On 1 January 1939 the RA replaced its traditional unit designation 'Brigade' by the modern 'Regiment', which allowed the 'AA Groups' to take the more usual formation title of 'Brigades'.

[8] As war broke out, 30th AA Brigade on Tyneside was transferring to 7th Anti-Aircraft Division, which was being formed to cover North East England.

During the early part of the Battle of Britain, German day and night air raids and mine laying began along the East Coast of England, intensifying throughout June 1940.

Thereafter the Luftwaffe concentrated on Royal Air Force (RAF) sites in the South of England, with occasional raids on the North East, such as the period 12–15 August.

[11] On 15 August, in the belief that the defences of NE England had been denuded, Luftflotte 5 attacked across the North Sea from bases in Occupied Norway.

As newly formed units joined AA Command, experienced ones began to be posted away for service overseas.

25 AA Brigade also set up a decoy site outside Bari and stationed some of its guns there to attract bombers away from the vital port.

The Luftwaffe was weak in the Adriatic but by September both 64th HAA and 31st LAA had batteries in the Partisan front lines in Yugoslavia providing ground support fire.

But unlike many other AA regiments in Italy that were being disbanded to provide infantry manpower, 64th HAA Rgt was transferred to the North West Europe theatre as a complete unit.

[32] After VE Day, the regiment continued occupation duties in British Army of the Rhine until it was placed in suspended animation on 21 February 1946.