to Flemington. All remaining 498 carriages were to be replaced by A sets from 2012, with the last scheduled for replacement in 2015. In March 2013, it was revealed that forty eight S sets would need to be retained after the full introduction of the A sets, as the option to build further A sets had lapsed, meaning no trains had been ordered for the South West Rail Link. The last Series 1 power car was withdrawn in January 2014. The final A set was delivered in June 2014. Following the delivery of the final A sets, Sydney Trains retained 48 four-car sets (192 carriages). In June 2014, the government announced that all timetabled services except those on the T7 Olympic Park shuttle, would be operated by air-conditioned trains. With the introduction of a new timetable in November 2017, 40 four car sets were temporarily required to operate the weekday service, while the B sets were delivered. This meant that S sets would once again be scheduled to operate services on all lines in Sector 2. Final days The remaining forty eight S sets were gradually replaced by twenty four eight-carriage B set trains throughout the course of 2018 and 2019, with 14 S set carriages being retained for heritage purposes. Six S sets were initially kept for emergencies but sufficient availabilities of other air-conditioned rolling stock ultimately deemed this redundant. The new B sets replaced timetabled K set runs, while the K sets moved on to S set runs. The remaining S sets were mostly phased out by the end of April 2019, with the introduction of an updated timetable of the Sydney Trains network. All of the final sets were withdrawn by June 2019. On 27 June 2019, Transport Minister Andrew Constance joined Sydney Trains Chief Executive Howard Collins and rail employees on a farewell run from Central Station across the Sydney Harbour Bridge to Lavender Bay. The last timetabled S set service ran on the following night, on 28 June 2019, on the T7 Olympic Park Line. Two public farewell events were held on Sunday 21 July 2019. The final revenue S set service was a special charter on the afternoon of 21 July, organised by the Sydney Electric Train Society and operated in conjunction with Transport Heritage NSW and Sydney Trains. During their final days S sets operated on the following lines: T2 Inner West and