On 8th January 1941, the Air Ministry approved the formation of a new Polish fighter squadron at RAF Acklington, just north of Newcastle-upon-Tyne. Most of the pilots were from the Polish city of Deblin, a famous nursery for Polish airmen, and 315 squadron became known as "Deblinski". The Polish pilots flew Hurricanes, Spitfires and Mustangs and served at bases throughout England and Norhtern Ireland during the Battle of Britain and until the end of the war. This book is the definitive work by leading Polish aviation authorities and the only book available in English on this subject.