There is a single disc version in the UK (region 2) which contains a trailer and an interview with the filmmaker. There has also been mention of a 2 disc version but this was delayed and I have been unable to find any definitive information about this. There is 2 disc Region 1 version which is much preferred to our version. The comparison is as follows:
Our Region 4 version misses out on:
The Region 1 version misses out on:
Clearly there is no real comparison. The Region 1 is far and way the version of choice.