Can confirm first hand that he does
You can tell him that the "MkII" on the MkIII sight is not incorrectly stamped - because it refers to the sight leaf and not the complete sight assembly. Ergo, the MkI sight leaf is on the Mk1 sight, but the MkII sight leaf is on the MkIII sight, because the MkII sight was the 300/600 flip sight.
I'm sure that you knew that....
p.s. as a proud Canadian, I'm a bit surprised that he didn't mention that the first large-scale use of the No4 was actually in August 1942 - Dieppe.
p.p.s as a proud Canadian he might be a bit disappointed to hear that the only Canadian part of his own rifle is the receiver; the rest is a mish-mash of other British parts added during or since its last service life in India.
Forgotten Weapons' video on the No 4, Mk l(T). Some interesting info here. I don't know whether there's any coordination between YouTubers re. subjects but good timing.
I'm looking forward to those videos. It will be interesting, amongst other things, to see how you found the shooting and reenactment combination.There was no coordination here.
Outside of actual collaborations (e.g. next week BM and BotR will release similar vids made from the same footage), we don't normally try to synchronise - sometimes it happens by sheer chance though.