United Kingdom, Aug. 1 -- Alstom, global leader in smart and sustainable mobility, will welcome almost 40,000 railfans from around the globe this weekend, as its Derby Litchurch Lane Works in the UK hosts the world's largest-ever gathering of historic and modern trains - The Greatest Gathering. Alstom's three-day sold-out charity extravaganza forms part of the wider festivities for Railway 200, a year-long celebration marking the opening of the Stockton and Darlington Railway (S&DR) on 27 September 1825 - and a journey that gave birth to the modern railway.The Greatest Gathering takes place on Friday 1, Saturday 2 and Sunday 3 August 2025 at Alstom's historic Litchurch Lane Site in Derby. Britain's biggest and oldest remaining train factory...