The 16th County of London Bn. (Queen's Westminster Rifles) London Regiment Cap Badge is a cap badge worn by soldiers serving in the Queen's Westminster Rifles regiment during World War I. The badge is made from high-quality metal, such as brass or nickel, and is designed to be worn on the front of a soldier's cap or beret.

The badge features the regiment's motto "Quis Separabit" (Latin for "Who shall separate us?") and a number of symbolic elements, such as the rose of England, the thistle of Scotland, and the shamrock of Ireland. These elements represent the regiment's connections to different parts of the United Kingdom.