The on-line catalogue is at http://www.nationalarchives.gov.uk/c...search.asp?j=1 and a search for... Word or phrase = small scale raiding force ...comes up with three hits, one in the ADM series, and two in the DEFE series. These should give you something to start with: ADM Records of the Admiralty, Naval Forces, Royal Marines, Coastguard, and related bodies Division within ADM Records of the Navy Board and the Board of Admiralty ADM 116 Admiralty: Record Office: Cases Subseries within ADM 116: COMBINED OPERATIONS (47) ADM 116/5112 Review of policy concerning operations of small scale aiding force and establishment of Special Boat Unit 1942-1944 DEFE Records of the Ministry of Defence Division within DEFE Military Operations Records DEFE 2 Combined Operations Headquarters, and Ministry of Defence, combined Operations Headquarters later Amphibious Warfare Headquarters: Records Subseries within DEFE 2: MISCELLANEOUS PAPERS DEFE 2/1093 Small scale raiding force: policy, formation, responsibility etc 1943-1945 DEFE 2/957 Small scale raiding force: procedures, responsibility etc 1942-1944 Forrest