Not gunners or sappers - it was an infantry unit I believe. Hence the SUSATs on the sa80s rather than iron sights.
Can't remember which one though - might have been the Green Jackets or the Royal Reg. of Fusiliers.
Rumour is that they wanted to practice beach landings like the RM do, but scoffed at the suggestion of performing a recce of the landing site first...........
Good lesson in the seven Ps anyway!