Complex sentence: ITV4 +1 was launched on Sky on 1 December 2008, on Freesat on 9 December 2008 and on Virgin Media on 25 March 2010.
Split into simpler sentences: ITV4 +1 was launched on Sky on 1 December 2008 and on Freesat on 9 December 2008. The timeshift channel arrived on Virgin Media on 25 March 2010.