They are Fitted with Metcalfe-Oerlikon Air and Vacuum Brake Equipment
An English Electric 1000hp Type 1 (later known as a Class 20) is the main illustration in this 1958 advert from Davies & Metcalfe Limited of Romiley. They had supplied their brake equipment for the freight locos of which twenty were now in service.
This advert appears in the following categories: Traction: Class 20 ; Supplier: Davies & Metcalfe ; Component: Brakes