Complex sentence: The first series began on the 19 March, concluding on the 9 April 2014, with a second series announced later in 2014 which launched on 23 April 2015 with a one hour special.
Split into simpler sentences: The first series began on the 19 March, concluding on the 9 April 2014. A second series was announced later in 2014 which launched on 23 April 2015 with a one hour special.