Nigel,
Sadly I have seen so many variations now, its hard to provide you with a correct layout, as it was a definite "optional" request from all services as you can imagine. Some wanted scopes included, others wanted night vision, also bipods off and housed etc.
I did this drawing which sadly isn't my original many years ago which gives the "USUAL" layout on ordering if that helps.
I found it far easier and more satisfying to place mine in a large PELI rifle case which offered more protection, one image below.