English Electric Type 2 Bo-Bo 'Baby Deltic' Locomotives B R Class 23, Design to DestructionEnglish Electric Type 2 Bo Bo 'Baby Deltic' Locomotives B R Class 23, Design to Destruction 35. 00 The British Railways Pilot Scheme orders of 1955 included ten English Electric Type 2 diesel electric locomotives deploying Napier Deltic engines. These locomotives, more colloquially known as the Baby Deltics, were introduced into traffic during 1959 for use on the Eastern Region of British Railways. This book looks at the history of the Class 23s,