Studio Ghibli UK Thread ~ Laptua + Yamada BD numbers fixed

Hi, can anyone tell me why Nausicaä of the Valley of the Wind isn’t sold Blu Ray + DVD Combo like the rest of Studio Ghibli’s Flims in the UK?
It was the first Ghibli Blu-ray released in the UK, released on the Optimum label, before they rebranded as Studiocanal, and it was as Studiocanal that they committed to doing Ghibli as BD DVD combos.