50008 Thunderer descends the steep gradient between Bicester South and Gavray Junctions on 23 August 2025 with the UK Railtours 1Z49 06:13 Princes Risborough to Bromley North 'The Kent Conundrum' railtour. 50049 Defiance is bringing up the rear of the train, which is the London Underground red liveried Class 438 4-TC set 428. This was only 35 minutes after sunrise, although some thin cloud luckily prevented what would otherwise have been a very backlit picture.