Found this British Pathe period film on how to shoot an Enfield rifle, military style. Also has some previews of the (then) new FN service rifle, and some experiments on the .280 bullpup. Nato squashed the .280, and Britain might have been better off to just adopt the M-16, given the last Enfield's complexity and performance.
The FN was a great rifle, but suffered the same problems as the U.S. M-14, lousy full-auto controllability with a full power service round. It was also pretty hard on the brass, banging in the neck on extraction where it hit the rifle on the way out. Not that the military cared much about old brass.
From Peter H's channel