This is the seventh volume in Midland's highly respected series detailing the losses suffered by the RAF's Bomber Command during, and in the case of this volume, in the years immediately after, the Second World War. The OTUs were the units in which aircrew got to grips with the heavy bombers they were to fly in combat. It is perhaps t surprising that the number of men who came to grief whilst training was very high. This volume, in common with the other books in the series, identifies the units involved in each incident as well as the aircraft and the individual members of the crew concerned. A brief description of the circumstances behind each loss is also given. In total, this book provides information on almost 2,400 losses. This is the penultimate volume in the the Bomber Command Losses series. An eighth book, is in preparation. This will be a role of hour, listing all the aircrew who perished in the service of Bomber Command during the conflict.