Transport for London (TfL) is the local government body responsible for the transport network in Greater London. It is a massive, highly unionized, and heavily scrutinized public sector organization. Interviewing at TfL is fundamentally competency-based and rigidly tied to their 'TfL Behaviours' (e.g., Fair and Consistent, Active and Involved). They operate critical national infrastructure (the London Underground handles millions of journeys a day), so the culture heavily indexes on 'Safety First', reliability, and process adherence over moving fast and breaking things. Whether you are an engineer preventing train collisions or an analyst modeling fare revenue, expect questions that probe your respect for strict governance, crisis management, and public accountability.