Seeking Help: Unit Info for Polish Armed Forces Lt. serving in Intelligence units for allies

Hi there! I've been searching for unit information concerning my great-grandfather. I am awaiting his service record from the MOD. I've pasted all the information I know below, as well as some photos to possibly help identify a unit. I've also noted with * the unit information I am searching for most. Thank you in advance. These forums have been an incredible resource for my research.

Name: Franciszek Władysław Szarek | DOB: Nov. 8, 1912
Polish Armed Forces - Lieutenant
Service Number: P/6891
1939 - 1940

British Army
Service #: P/204843
1941 - 1943: 8th G.C.R Royal West African Frontier Force (RWAFF)

1943 - 1944: Camp Woodhouse Lee, Scotland as "Polish Regular Forces as Interrogation and Liaison Officer" - *Looking for unit information*
Camp Woodhouse Lee Photos:




US Army
Service #: A20364
1945 - 1946: Polish Prisoner of War Selection and Interrogation Pool, Team A ;
interrogating at several German POW Camps *Looking for unit information*
US Army 1945 photos:



"Polish Guard Co."