 In May 2014, all Hornsby sets were transferred 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.