On the weekend of 5 July 2008, "Mallard" was taken outside for the first time in years and displayed beside the three other A4s that are resident in the UK, thus reuniting them for the first time since preservation. It departed the museum for the National Railway Museum Shildon on 23 June 2010, where it was a static exhibit, until it was hauled back to York on 19 July 2011 and put back on display in its original location in the Great Hall. In July 2019, it made its first outside appearance since 2014 when it was displayed at York station alongside a Class 800 "Azuma" as parts of the latter's launch by London North Eastern Railway.