Complex sentence: On 12 September 2008 TfL announced that Serco Group would take over the operation of the service from 1 October 2008; the contract ran initially until 31 March 2010.
Split into simpler sentences: On 12 September 2008 TfL announced that Serco Group would take over the operation of the service from 1 October 2008. The contract ran initially until 31 March 2010.