Thank you gents.
I should have mentioned that I’m only shooting in HLG to benefit from the added dynamic range in grading, not to create HDR content. Having made sure my working colour space was rec.709 and double-checked my export settings, I’ve got it matching.
Having used Filmconvert Nitrate with the HLG2 profile, the footage looks good.
Premiere still seems to be very unreliable with frequent restarts. I’ve also noticed that mask tracking isn’t working; Adobe is getting back to me on that!
Eight years of using Premiere Pro, and eight years of stress! Lol!
Ready to jump to Davinci resolve, I think!