Southeastern High Speed Extended is a United Kingdom base route developed and maintained by Dovetail Games, for their Train Sim World Console and PC platforms and was released on Sep 6, 2022 for the TSW3 video game. Southeastern High Speed Intl is a train service that operates between London St Pancras and Ashford International, and is the fastest domestic train in Europe:

Overview	Southeastern High Speed Intl
Speed	Up to 140 mph (225 km/h)
Train type	Class 395 “Javelin” trains with six carriages
Class	Standard Class with a 2+2 layout and power sockets under each pair of seats
Operator	Southeastern
Destinations	East London and Kent

Ashford International is a train station that connects travelers with London and South East England via Southeastern high-speed Intl.

Southeastern High Speed Intl is also a downloadable content (DLC) add-on for the base game TSW3 on Steam. The DLC includes the Ashford International and Dartford route, as well as a variety of train classes.

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South Eastern Railway Limited

Southeastern Extended

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Locations

Ashford International Station

Northfleet Station

Swanscombe Station

Greenhithe Station

Stone Crossing Station

Dartford Station