First I’d like to thank you for this Mangowolf. I love the regraded colours.
I was sincerely hoping that the UK 40th anniversary Bluray was used as the source for this. Sadly it appears that the source was the US 40th anniversary Bluray which contains an editing error at the beginning of the movie. At 01:46 there is a close-up of a boot which is supposed to fade out to black as all the other shots in this sequence do. In the US release (and this regrade) the fade is replaced by a hard cut to black. This error is not present on the UK disc and the shot fades out as it should.
EDIT: Also may be worth a mention that the German 4K UHD release is also fixed and has the correct fade.