DO NOT BUY!!!
This is an incomplete edition of the film,
The UK DVD's and BluRays all feature the incorrect version of the film, meaning it is different from the theatrical release. There is also a host of additional features missing from the version originally advertised.
This is down to the correct content not arriving intime for the disc pressing, so the manufacturer made do with an inferior version of the film. It is also not the version not certified by the BBFC, which infringes trade laws.
In short Disney will release a special edition in the future, relying on everyone wronged in the UK to buy another copy, even though as of this time they havent announced whether they will include the missing content (such as director commentary) or the correct cut of the film.
DO NOT BUY! WAIT FOR THE CORRECT VERSION!