This sounds promising, as well:
https://www.railmagazine.com/news/2024/09/19/replica-of-locomotion-no-1-to-re-enact-first-rail-passenger-journey>The celebrations will include a re-enactment of the first journey on the S&DR, taking place on 26, 27 and 28 September 2025. A newly renovated replica of Locomotion No. 1, the passenger carriage Experiment and coal waggons will run on sections of the original S&DR line over three days. Spectators will be able to see the train at designated locations and visit special events organised along the route over the three days. The Anniversary Celebration is sponsored by LNER and the festival team is working with Network Rail on route planning and delivery of the event.I'm genuinely pleased that there's a 'proper history' angle to this as well: it feels just and right for Locomotion No.1 - or at least the NRM's replica - to have a fire lit in its belly and to haul a train along the same line its predecessor did, two centuries previous.