Thanks for taking the time to post those pictures.
You are extremely fortunate to have an example of an RTS, even if it is not in the best of condition. It looks like it has come out of the ground? It seems to be a Mark II as it looks like there is no copper "trumpet" folded over the top of the envelope. See my website here for the differences between the Mark I and II. https://sites.google.com/site/britmi...inch-explosive
Although the RTS was a sealed design, there are lots of differences between them. If you X-rayed ten examples eight would probably be different. This is especially true also of the RTT.
Could I make a couple of comments on your other rounds.
The blank you show as a Cordite Mark II is in fact a Mark VI with mock bullet that has lost its blacking to the case over the years. You will see that yours has a separate brass mock bullet whilst the Mark II and III blanks have the "bullet" part smoothly formed in one piece with the case. The only difference between them is that the Mark II has the small Boxer cap whilst the Mark III has the larger .250 inch Berdan cap.
Details here: https://sites.google.com/site/britmi...-cordite-blank
The round you have labelled as an AP W Mark I is a tracer, probably a G Mark II. The core of the W.I takes up most of the interior of the envelope apart from a thin lead sheath.
Finally, your Kynoch BZ incendiary was actually taken into emergency service in 1940 and was given the title of Incendiary B Mark IV*.