The late second world war spike bayonet was almost universally loathed. It was therefore seen as a priority to replace it once the war had ended and more money became available. The first design, the No7 was an elaborate bayonet that could be changed though a swivel mechanism from a knife to a socket bayonet. Perhaps unsurprisingly those in charge of the purse strings decided this was too expensive and a cheaper alternative was sought. The resulting bayonet, the No9, combined the old spike bayonet socket with the clip-pointed blade of the bayonet developed for the No5 Jungle carbine. Indeed due to having the same shaped blade, the No9 was able to use the same scabbard as the No5 bayonet.
The No 9 bayonet was officially adopted in 1947, with a variety of manufacturers producing them for the British government. Unfortunately my example of the No9 is missing its scabbard:As can be seen the blade is of the ‘bowie’ type and is simply welded to the socket. There are a number of markings on the socket:As can be seen there is the /|\ acceptance mark of the war department and the official designation of the bayonet as a No9 Mk1. The mark below this is a combined ‘E’ and ‘D’, which is the marking for the Royal Small Arms Factory, Enfield. Enfield produced 366,902 of these bayonets from 1949-1956. The ‘50’ number after their mark shows this example dates form 1950.
The bayonet fastened to the rifle in the same manner as the earlier spike bayonet, using a sprung socket that was fitted over the muzzle and twisted to lock it into place: