This isn't true. there are currently no plans in place for movie rentals/downloads via itunes uk. Apple US are very close to signing a deal with major distibutors but there is no telling whether or not the UK will be granted access to these and other movies which are already freely available on itunes us.
My suggestion for movie downloads would be to try other sites which are compatible and lets face it alot cheaper than itunes. Even if the boffins in america choose to let uk customers have access to the movies, they will be a lot more expensive than what our american cousins pay. They pay around $10 for a movie. i can guarantee that if we are given this privilage we will have to fork out upwards of £10. One may ask why bother, just go out and buy the dvd?