66506 Crewe Regeneration approaches Islip on 25 May 2025 with the UK Railtours 1Z60 10:03 Princes Risborough to Nuneaton 'The Green Shed' railtour. 50008 Thunderer is bringing up the rear. The coaching stock is the London Underground liveried 4-TC set. Note the H&H (Hanson & Hall) sign in the loco cab window.