The landing craft crews taking part in the Normandy campaign were a truly international bunch. Each craft carried troops of many different nationalities, not just the same nationality as the crew.
British landing craft were crewed by members of the Royal Navy and Royal Marines. The former included members of the Royal Naval Volunteer Reserve (RNVR), Royal Naval Reserve (RNR) and Royal Naval Patrol Service (RNPS). Individual personnel from Commonwealth forces such as the Royal Australian Navy Volunteer Reserve (RANVR) also served on some craft, as did some individuals from ‘Free’ forces from Nazi-occupied countries.
Above: Photo of Stoker E. Nixon RCNVR of LCI(L) 121, 260 LCI(L) Flotilla RCN, in England in March 1944. (Credit: PO Guy Joseph Aime Goulet / Canada. Dept. of National Defence / Library and Archives Canada / PA-171710.)
American crews were composed of either US Navy or US Coast Guard personnel, including from the United States Naval Reserve (USNR) and the United States Coast Guard Reserve (USCGR).
The third major national force operating landing craft at Normandy was the Royal Canadian Navy (RCN), which manned several flotillas and landing ships.
Above: This US photo is said to show crewmen from a British LST having their first night of decent rest after D-Day, having gone ashore at Omaha Beach on 21 June 1944. (Photo: US National Archives)
You can find more information about British landing craft crews on CombinedOps.com. That website’s page on relevant Royal Navy shore bases in the UK is particularly useful if you are trying to research the career of a British landing craft crewman.