On 1st July 1940 the Luftwaffe formed a new unit at Koln-Ostheim airfield. This unit, given the designation Erprobungsgruppe 210, adopted the emblem of the British Isles in a gun/bomb sight graticule. In the forthcoming months the unit would be in the thick of the action during the Battle of Britain. Although composed of ordinary aircrew, theirs was a specialist role within the Luftwaffe Order of Battle. Using the standard German fighter aircraft, the Messerschmitt 109 and 110, they were deployed against England as a low level precision fighter-bomber unit. They also operationally tested the Messerschmitt 110 with an experimental 30 mm. cannon in place of the standard two 20 mm. armament, but they were not to fulfill perhaps their most important task, as an invasion of the south coast of England did not occur in 1940. For the first time in print details of this unit's almost certain suicidal role in the invasion plans are revealed. This work also provides far more comprehensive information on the well-known missions conducted by the unit, as well as bringing to light other raids not previously ascribed to them. The vast majority of photographs of aircraft and aircrew will be new to Battle of Britain readers, having been culled from many private sources in Germany. This work fills a significant gap in our knowledge and understanding of Luftwaffe fighter-bomber incursions over England during the Battle of Britain, and will appeal to the general reader, enthusiast and modeller alike Signed by: Bombo Schenck Wolfgang Schenck (7 February 1913 – 5 March 2010) was a German Luftwaffe fighter ace and recipient of the Knight's Cross of the Iron Cross with Oak Leaves during World War II. He was born in Windhoek in German West Africa (now Namibia). Wolfgang Schenck was an important figure in the Luftwaffe's development of the fighter-bomber, as well as pioneering work in the use of the Me 262 jet-bomber.