I've pre orderd this from criterion from zavvi in the uk.
Your criterion order of Mulholland Dr on Zavvi UK (It's the USA release) it will be ok as in you will have order dispatched but don't be surprised if you see Criterion USA listing removed on Zavvi UK at some stage
Zavvi UK themselves should not be selling DVD/Blu-ray releases that are not BBFC certifted
Criterion Citizen Kane USA release has already been removed from Zavvi UK but is still listed on Zavvi USA
It can take a while sometimes before BBFC notice listings on UK retailers websites some get missed
It's ok to be listed on Zavvi USA as that is now separate website from Zavvi UK and the other Zavvi International websites
You will see for example Arrow USA only releases on Zavvi USA you won't find listed on Zavvi UK or the other Zavvi international websites
Also The Scream Factory and Blu Underground titles should not be on Zavvi UK
These should only be listed on Zavvi USA
To get around BBFC if Zavvi wanted to list USA releases on Zavvi UK they should clearly be listed as sold by Zavvi USA
This what Amazon UK do (They list as sold by Amazon USA)
Criteron won't be releasing Mulholland Drive in UK
StudioCanal have the rights in UK/France
You should see 4K Mulholland Drive from StudioCanal a UK release be also announced at some stage
Criterion USA release is licenced from StudioCanal
StudioCanal release their films themselves in UK/France/Germany/Australia
Sometimes Germany rights are with different label it will depend on film involved
Other countries they licence out to other labels
In USA StudioCanal licence out their films catalouge to Lionsgate/Criteron/Scream Factory and a few other labels