Chemical Corps affiliation with the corps. The Chemical Corps branch insignia consists of a cobalt blue, enamel benzene ring superimposed over two crossed gold retorts. The branch insignia, which was adopted in 1918 by the fledgling Chemical Service, measures .5 inches in height by 1.81 inches in width. Crossed shells with a dragon head was also commonly used in France for the Chemical service. The Chemical Warfare Service approved the insignia in 1921 and in 1924 the ring adopted the cobalt blue enamel. When the Chemical Warfare Service changed designations to the Chemical Corps in 1946 the symbol was retained. The regimental
Carl Au of "Bright Phoenix". He was cast in 2017 as Bobby in Jeff Pope's production "Cilla The Musical", an adaptation of the ITV television series. Au currently splits his time between Liverpool and London. Au is highly skilled in ballad, ballet, baritone, choreography, contemporary dance, jazz dancing and jazz singing. Carl Au Carl Andrew Au (born April 1987) is a British actor, known for his role as Barry Barry in BBC school drama, "Waterloo Road" and his many stage credits. Au began his stage career in 1998, whilst very young. He played Tootles and Nibs in a production of "Peter Pan".