You’ve really no idea have you? The L85 is over half a KG lighter the the SLR. It id ergonomically fine, as been demonstrated in the last 30 years. It also has many great advantages over the SLR, which you simply wouldn’t comprehend as you’ve never had to use it as a daily work tool.
The C8 will replace the L85 to become the British Army’s GS rifle.
It's not ergonomically fine in the slightest. You've been trained to cope. And the most successful part of the project has been the official coping programme to train you to parrot lines like that, and "it's a training issue... you get used to it... it's really accurate (although it's not particularly)... it's world-beating"
I can guarantee a laugh line when I bring up what you have to do to reapply the safety to people who've trained on M16, Stgw 90 etc. And the fact that people think it's normal and OK to have to move your support hand to re-apply it with your support hand thumb proves the outstanding success of the official coping programme.