Complex sentence: The European Parliament election was the United Kingdom's component of the 2009 European Parliament election, the voting for which was held on Thursday 4 June 2009, coinciding with the 2009 local elections in England.
Split into simpler sentences: The European Parliament election was the United Kingdom's component of the 2009 European Parliament election, the voting for which was held on Thursday 4 June 2009. The election was held concurrently with the 2009 local elections in England.