The 50th Light Anti-Aircraft Regiment, Royal Artillery, (50th LAA Rgt) was an air defence unit of the British Army during World War II.

After serving with Anti-Aircraft Command in the defence of the UK, it trained to take part in the Allied invasion of Normandy (Operation Overlord).

These units were deployed to defend vulnerable points (VPs) such as bridges, factories or airfields against low-flying or dive-bombing daylight raids, but could do little against high-flying night raiders during the Blitz.

Before the end of the year the whole regiment had moved into 63rd AA Bde[11][14] At this time every available LAA gun was being deployed to the South Coast towns of England to defend against 'hit and run' attacks by Luftwaffe Fighter-bombers.

[3][15][16] During May 1943 the regiment became unbrigaded once more, and by 24 July it had left AA Command and joined 21st Army Group under training for the Allied invasion of Normandy, Operation Overlord.

The regiment with its three batteries was designated as a semi-mobile unit, intended to defend VPs behind the front line as the campaign developed.