partial exemption through partial conversion to improve accessibility; and the 'C' fleet, the exempt heritage fleet. The standard livery for the main fleet, introduced on the Flexity 2 trams, has purple fronts, with white sides, black window frames and a purple criss-cross pattern on the lower sides. Two of the modified Balloon trams have also been painted into the purple livery. Bombardier Flexity 2 As part of the upgrade, 16 Bombardier Flexity 2 trams were ordered and were numbered 001–016. The worldwide launch of this type of tram including showing the first new tram occurred on 8 September 2011 at the new Starr Gate depot. These state-of-the-art trams include many improvements, such as 100% step-free access from platform to tram, dedicated wheelchair spaces, higher seating and standing capacity, faster acceleration and quieter running. They have audio-visual 'next stop' displays. Two further Flexity 2 units, numbered 017 and 018, arrived on 1 and 15 December 2017 respectively after being ordered to assist with service demands when the extension to Blackpool North railway station opens. They entered service on 4 March 2018. The Flexity 2 trams are all accommodated at the depot at Starr Gate. Modified 'Balloon' double-deck cars Nine of the rebuilt Balloon cars numbered 700, 707, 709, 711, 713, 718, 719, 720 and 724, were modified, which included widening of the platforms between 2009 and 2012, so that they are compatible with the tram stop platforms and are available for both stage carriage duties, and as additional trams for the heritage service. Only four examples are now believed to be operational. Heritage fleet Blackpool has an extensive history of tramcars. A large fleet of vehicles that were retained from previous generations of the town's tramway operations, as well as some from other locations, are now operated as Blackpool Heritage Tram Tours. The heritage tramcars mostly use the traditional green and cream livery of BTS in various styles from the 1930s to the 1990s, with some cars using red and cream/ white liveries and other assorted liveries. Some trams carry colourful all-over advertisements. Infrastructure Track The route is made up of four different types of track: Street running, open to all traffic – along Lord Street and North Albert Street in Fleetwood, and the soon-to-be-opened line to Blackpool North along Talbot Road in the town centre. There is also a stretch in Blackpool from Rigby Road Depot to the Promenade along