Ian makes a very interesting point at 2 minutes into this video. If you check his other videos, he's made two other recent films about the SA80; one about the generally troubled history of the weapon, the other about early prototypes.
Ian has actually done a full series exploring the problems of the SA80 series from its conception up to its current iteration. Love or hate the SA80, its a fascinating series and a fresh look at the problematic birth of what should have been a world leading weapons system. I think these are in order of publication.