Private Joseph Duffy joined L Detachment, SAS, from No 11 Commando on the 28th August 1941 and was accidentally killed in training due to a parachute failure, along with his friend and fellow Seaforth Highlander, Private Kenneth Warburton. Location given as East side of the Great Bitter Lake. The pair became the Regiment's first casualties.​ 

Corporal Lee Fitzsimmons died when the Puma helicopter he was travelling in crashed during operations. [Source: AFM ROH / Media reports online.]

Lance Corporal Sidney Hildreth, formerly 7 Commando, was reported missing, later confirmed killed, whilst attached to 'L' Detachment SAS.  He left the Commando to join the SAS on the 30th August 1941 and was fatally injured parachuting into the SAS first raid, Operation Squatter, an abortive attack against airfields at Tmimi and Gazala. He has no known grave.

Lance Sergeant William McNinch died during operations at Termoli Italy with the Special Raiding Squadron having left the Commando. A veteran of the Litani River raid he died when a shell hit the truck that he was sitting in. He was awarded the Military Medal in recognition of distinguished service during operations on the day before his death.
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Trooper Adrian Powell died in a road traffic collision whilst serving with the SAS. He had previously served with  7 and 148 Btys. of 29 Commando Regt. RA, and 7 RHA.  He died when the vehicle in which he was travelling overturned while on way to training exercises near Nairobi in Kenya.

Also killed in this collision was 24648153 SSgt. Martin Halls, SAS, formerly Royal Engineers.

Lance Sergeant Fred Senior died when his jeep patrol was attacked whilst en route to harass the enemy in Southern Tunisia. He was serving with 1st SAS  ('B' Sqn.) at the time of his death having left the Commandos.