The rest of the film is nowhere near as grainy as this opening and yet there's always an ever-present layer of the stuff helping to add texture. Right from the start I was digging the UHD as there's a very prominent level of grain in the black and white prologue, even more so in the 'flashback' to Bond fighting the fella in the bathroom which was pumped up in the DI to look insanely gritty, and way more contrasty than the accompanying office scene.
This is going to be the really really really really long version.