Creation in 2013 Following the
2011 state election, the newly elected
O'Farrell government embarked on reform of transport in New South Wales, creating a new organisation,
Transport for NSW, in November of that year. This was followed up with another government reform, which saw
Sydney Trains take over operation of the Sydney suburban rail network from
CityRail in July 2013. Transport for NSW developed a new rail timetable and branding, which was put into effect on 20 October 2013. This saw three former CityRail services, the Airport & East Hills Line (), the Inner West Line () and the South Line (), merged to form the
Airport, Inner West & South Line. A new numbering system was also introduced and the new line was given the number
T2. The 2013 timetable was designed to integrate the projects of the
Rail Clearways Program, a 2004 plan to divide the network's fourteen metropolitan rail lines into five independent "clearways" by installing extra tracks, passing loops, turnouts and turnbacks at pinch points around the network, such as at Homebush and Lidcombe. By 2013, the Rail Clearways Program was substantially complete. At the same time, the delivery of 78 new
Waratah trains was almost complete as well.
Leppington extension in 2015 A branch of the service along the
South West railway line to commenced operating on 13 December 2015, following the new rail link's completion earlier that year. T2 services replaced an earlier temporary shuttle service between Leppington and .
Split with T8 in 2017 A new Sydney Trains timetable was introduced on 26 November 2017, in which the original T2 services were split in two. Existing services from Leppington to the
City Circle via , alongside newly extended all stops services from that had previously terminated at , were rebranded as the
T2 Inner West & Leppington Line. This reduced T2 was recoloured light blue, harkening back to CityRail's historical colour scheme for services along this route. Meanwhile, former T2 services from to the City Circle via were rebranded as the
T8 Airport & South Line, moving to a new number but keeping the original T2's green colour, again aligning with the former CityRail colour scheme for services via East Hills. Despite the separation in branding, the T2 and T8 remain operationally linked, with services from one generally through-running onto the other upon reaching the City Circle.
Renaming in 2024 Timetabling changes in 2024 saw the name reordered to be
T2 Leppington & Inner West Line. This coincided with the redesignation of T3 services as the
Liverpool & Inner West Line, following their realignment to run alongside T2 services via rather than via as they had previously. ==Rolling stock==