The TADEN was a British experimental light machine gun firing the .280 in (7 mm) intermediate round. Alongside the bullpup EM-2 rifle design, it formed part of a proposal to reequip the British Army with new small arms which would use a round smaller than the .303 inch which was shown to be impractical for use in a modern assault rifle. The Taden would replace the Bren gun as the light machine gun and the Vickers machine gun as the medium machine gun. The Taden used elements of the Bren. The EM-2 would replace the Lee-Enfield rifle and 9 mm submachine guns.