Amazon.com.uk has announced a release date for Series 4 of Law & Order: UK, July 4th, 2011. American Independence Day. That amuses me. ;) Also being released that day is Series 1-4 in a boxed set.
Sadly, no word yet on when Season 2 will hit U.S. shelves, but I hope soon since BBCA has aired the Series 4/Season 2 finale.