Probably not in the near future. Playtesting of the DYO rules is ongoing and now taking up much of my time. The DYO Extension was built to capture some of the administrative things, reduce some clutter, support any new counters (like the AT Teams, MG Teams, and Combat Engineer counters) with supporting rules, and provide some additional vehicle counters we found during our research of TO&E. We limited our focus to just the three nationalities to start, mainly due to availability of resource material. I do have a pdf copy of "TM30-410 Handbook On The British Army1942" but that is the extent of me gathering anything regarding the Commonwealth forces at this time.
Now, that being said, I will be creating a v4 of the extension when the 6.6.8 release occurs. Mainly to remove some things that have made it into the main module (the stairwell overlay), or more recently, the VBM mask extension I pulled out separately. That does give me an opportunity to at least add a British tab with the few things you mention even if I have nothing else to add to those forces. If you ever happen to see me on VASL (in a room starting with "DYO") pop in a take a look at the scenario being played, at least with the extension everything should display.