Pues según uno de un foro de UK, me da la impresión de que han tirado del disco USA para el de UK:

"This is a direct clone of the US release (as is often the case this extends as far as still having the 'FBI Warning' when you select Play from the menu). English DTS-HD MA 5.1 and French DTS 5.1 and the only soundtracks on offer, while subtitles are limited to English SDH, Spanish and French.

Extras on the Theatrical Cut menu (the one the disc automatically loads up) take the form of the Making of, Storyboarding, Theatrical Trailer, My Scenes and D-Box Motion Code. But if you select Go to Director's Cut you get all of those plus Peter Jackson's 10th Anniversary Intro (which automatically plays before the Director's Cut) and the Audio Commentary by Peter Jackson. "