 As with St John Ambulance in England since the 19th century, this style has been essentially copied from successive versions of a (London) Metropolitan Police No.1 (ceremonial/formal) uniform.High visibility jerkins & jackets in fluorescent yellow with green yokes are worn by all ranks when required on operations.A special uniform is authorised for members attached to Cycle Response Units that includes customised cycling jacket & trousers, polo shirt, helmet, gloves and equipment vest.