Returning to port on Christmas Day 1942, Young received a signal ordering him to return to the United Kingdom to attend the Commanding Officer's Qualifying Course (COQC).
Arriving back in England in January 1943 Young passed the COQC (or perisher as it was commonly known) and was appointed commanding officer of HMS P555, an American S class boat acquired by the Royal Navy in 1942.
 Young commanded the boat, known as State Express after the cigarette brand, for three months before being appointed as commander of a new boat, then under construction.
 On his appointment to P555 Young was the first British RNVR officer to command a submarine.
Returning to port on Christmas Day 1942, Young received a signal ordering him to return to the United Kingdom to attend the Commanding Officer's Qualifying Course (COQC). Arriving back in England in January 1943 Young passed the COQC (or perisher as it was commonly known) and was appointed commanding officer of HMS P555, an American S class boat acquired by the Royal Navy in 1942.  Young commanded the boat, known as State Express after the cigarette brand, for three months before being appointed as commander of a new boat, then under construction.  On his appointment to P555 Young was the first British RNVR officer to command a submarine.
Edward Preston Young