Complex sentence: The premiere was held in London on 18 February 2008, and the film was released in both the UK on 29 February 2008, and in the US on 7 March 2008.
Split into simpler sentences: The premiere was held in London on 18 February 2008. The film was released in both the UK on 29 February 2008 and in the US on 7 March 2008.