In 1938 the two territorial battalions formed duplicates, thus forming the 1/7th, 2/7th, 1/8th and 2/8th battalions.
Before the Second World War the Middlesex Regiment was chosen as one of four other infantry regiments to be converted to a machine gun regiment.
The 1/7th Battalion served with the 51st (Highland) Infantry Division.

In 1943, the 1/8th officially became the 8th Battalion as part of the MG Battalion attached to the 43rd (Wessex) Infantry Division during the Normandy Campaign during which they fought in the Battle for Caen.
The 1st Battalion was part of an allied force which held out against overwhelming odds for 17 days during the Battle of Hong Kong before surrendering to the Imperial Japanese Army in December 1941.
In 1938 the two territorial battalions formed duplicates, thus forming the 1/7th, 2/7th, 1/8th and 2/8th battalions. Before the Second World War the Middlesex Regiment was chosen as one of four other infantry regiments to be converted to a machine gun regiment. The 1/7th Battalion served with the 51st (Highland) Infantry Division.
In 1943, the 1/8th officially became the 8th Battalion as part of the MG Battalion attached to the 43rd (Wessex) Infantry Division during the Normandy Campaign during which they fought in the Battle for Caen. The 1st Battalion was part of an allied force which held out against overwhelming odds for 17 days during the Battle of Hong Kong before surrendering to the Imperial Japanese Army in December 1941.
Middlesex Regiment