St Pancras contains four groups of platforms on two levels, accessed via the main concourse at ground level.
 The below-surface group contains through platforms A and B, and the upper level has three groups of terminal platforms: domestic platforms 1–4 and 11–13 on each side of international platforms 5–10.
 Platforms A & B serve Thameslink, 1–4 connect to the Midland Main Line, while platforms 11–13 lead to High Speed 1; there is no connection between the two lines, except for a maintenance siding outside the station.
There are also a variety of shops and restaurants within the station concourse.

The station is the London terminus for Eurostar's high-speed trains to Paris, Brussels, Amsterdam and Lille via the Channel Tunnel.
It is also the terminus for East Midlands Railway services from London to Derby, Leicester, Nottingham, Sheffield, and smaller towns en route.
Thameslink trains on the cross-London Thameslink route call at platforms beneath the main station, south to Gatwick Airport and Brighton and north to Luton Airport Parkway for Luton Airport and Bedford.
High-speed domestic services to Kent, run by Southeastern, depart on the same level as Eurostar & East Midlands Railway.

The terminal is one of relatively few railway stations in England to feature multilingual signage in English and French.
In March 2014, the station's public relations team commissioned a study of mispronounced words, reportedly as a result of passengers referring to the station as "St Pancreas".
St Pancras contains four groups of platforms on two levels, accessed via the main concourse at ground level.  The below-surface group contains through platforms A and B, and the upper level has three groups of terminal platforms: domestic platforms 1–4 and 11–13 on each side of international platforms 5–10.  Platforms A & B serve Thameslink, 1–4 connect to the Midland Main Line, while platforms 11–13 lead to High Speed 1; there is no connection between the two lines, except for a maintenance siding outside the station. There are also a variety of shops and restaurants within the station concourse.
The station is the London terminus for Eurostar's high-speed trains to Paris, Brussels, Amsterdam and Lille via the Channel Tunnel. It is also the terminus for East Midlands Railway services from London to Derby, Leicester, Nottingham, Sheffield, and smaller towns en route. Thameslink trains on the cross-London Thameslink route call at platforms beneath the main station, south to Gatwick Airport and Brighton and north to Luton Airport Parkway for Luton Airport and Bedford. High-speed domestic services to Kent, run by Southeastern, depart on the same level as Eurostar & East Midlands Railway.
The terminal is one of relatively few railway stations in England to feature multilingual signage in English and French. In March 2014, the station's public relations team commissioned a study of mispronounced words, reportedly as a result of passengers referring to the station as "St Pancreas".
St Pancras railway station