The Duke of Cornwall's Light Infantry (DCLI) was a light infantry regiment of the British Army in existence from 1881 to 1959.

The Somerset and Cornwall Light Infantry (SCLI) was a light infantry regiment of the British Army. It was formed in October 1959 by the merger of the Somerset Light Infantry and the Duke of Cornwall's Light Infantry, and was itself merged with three other regiments of the Light Infantry Brigade in 1968 to form The Light Infantry.