on LNER Class A4 60009 Union of South Africa at the Severn Valley Railway before their delivery to Meiningen for fitting to Tornado. The boiler was hydraulically tested at the manufacturer's factory at one-and-a-half times working pressure and was passed safe. On 11 January 2008, the boiler passed its first steam test in a series of tests carried out by an external boiler inspector. For the test, the fire was lit and the boiler was allowed to warm up for over 48 hours before being then taken up to , just over the maximum working pressure, with the safety valves set to the correct pressure. The boiler was noted by the inspector to be a very rapid one, boding well for use on the mainline, and noted Tornado exhibited no leaks of any kind, in contrast to heritage locomotive restorations. The tender body was not yet finished by this time so the test was conducted using a water bowser. The boiler created steam so efficiently that the water supply was being used faster than it could be replenished by the mains water supply to the works. To complete the test and not prematurely damp down the fire, an emergency call for water was made to the local fire brigade, who responded with a fire tender to supply more water. This was sensationally but inaccurately reported in one local newspaper as "fire brigade called to prevent boiler explosion". Launch and Great Central Railway trials Low speed trials of Tornado as a live steam locomotive first occurred on the long track at Darlington Works. After a series of private tests, Tornado made her first in-steam moves on 29 July 2008, followed by its official launch on 1 August, moving up and down the test siding in front of the press. The 1 August launch coincided with the 40th anniversary of the end of steam on British Railways on 4 August 1968, and the 60th anniversary of the entry into traffic of the first Peppercorn A1 class locomotive, No. 60114 W.P. Allen. On 7 August, Tornado was entered onto Total Operations Processing System (TOPS), a computer system used in the UK for managing locomotives and rolling stock. Although the painted number is 60163, Tornado is designated 98863 on the British main line in TOPS, where "98" describes a steam engine, the "8" stems from the power classification of 8P, and "63" comes from