In 1961, the UKhad only recently switched to the FN -FAL. Lee Enfields continued to be used officially in places like India throughout the 60s and 70s....some even today.
And in these modern times of plastic, short-range rifles with all sorts of flashlights, ipods, and pez dispensers sticking out of them, it is good to remember that well-built bolt action rifles (that have been decently maintained) can probably do their job just as well as they did 100 years ago. A Lee Enfield cannot check your email for you, but it can still reliably feed potent ammo and hit targets hard out to some considerable distance. Milk has an expiration date, but good rifles don't.