St Pancras railway station, also known as London St Pancras or St Pancras International and officially since 2007 as London St Pancras International, is a central London railway terminus on Euston Road in the London Borough of Camden.

To find the Thameslink platforms at London St Pancras International in 2026, you must head to the Lower Level of the station. These platforms (A and B) are located beneath the main Eurostar and domestic high-speed concourses. If you are entering from the main Euston Road entrance, follow the signs for "International" and then look for the specific Thameslink/Underground escalators located near the middle of the station’s undercroft, close to the shops and the entrance to the London Underground. These platforms are a through-station, meaning they serve as a critical north-south link for trains running from Bedford/Brighton and through the "Core" section to destinations like Blackfriars and London Bridge. A 2026 "pro-tip" is to ensure you check the departure screens carefully, as the Thameslink platforms are geographically distinct from the "High Level" platforms used by Southeastern and East Midlands Railway.