to complete overhaul by 2004, but it was pushed back to 2007 and then to 2014. In 2018, the GWS board decided not register any of its locomotives for mainline certification as it believed it would earn a more reliable income as a locomotive for hire on other heritage lines. In addition, the GWS felt the costly installation of electronic equipment, and other modifications required for mainline running, would denigrate its original and authentic appearance. On 13 August 2021, Pendennis Castle was steamed for the first time in 27 years. On 2 February 2022, it moved under its own steam for the first time since 1994, and for the first time in the UK since 1977. It was officially relaunched into traffic at a special event at Didcot on 2 April 2022. References Sources Further reading External links No. 4079 at Didcot Railway Centre.org.uk 4079 Individual locomotives of Great Britain 4079 Railway locomotives introduced in 1924 Standard gauge steam locomotives of Great Britain