Blue Planet II Comes To iPlayer In 4K HDR
The web site says that it will be available on iPlayer
immediately after the final episode on Sunday.
Which is seven weeks too late, since most people will have already
watched it in HD, too late for UHD.
Sky Q makes UHD downloads available as soon as the HD episode starts
airing. Although a pitiful selection at present, two or three
programmes a week.
The first series of Babylon Berlin was UHD (converted) but not the
second series which continued straight on.
No BBC UHD material on Sky Q.