Mayor asked to reveal Piccadilly line train issue

London's mayor, Sir Sadiq Khan, faces increasing calls for transparency regarding the year-long delay in the rollout of new Piccadilly line trains, with Conservative assembly member Keith Prince demanding answers. Originally set to enter service in 2025, the new fleet's timeline has been pushed to late 2026 due to technical issues discovered during testing. Khan explained that the process has been prolonged by challenges related to design, build, and commissioning. The fleet, which aims to replace outdated 1970s trains, includes modern features like air-conditioning and on-board CCTV. Testing commenced in August 2025, but complications arose with a prototype, leading to necessary modifications that could pose safety risks.

TfL commissioner Andy Lord highlighted the complexity of the new model and the importance of a safe, reliable introduction. Further issues between the manufacturer and TfL have also contributed to the delays. The situation raises concerns about the aging infrastructure of the Piccadilly line, one of the deepest Tube lines in London.