Division 4.2.8 Driver's cab emergency exits
United Kingdom
In an emergency, evacuation from the driver's cab (or access to the interior of the train by the emergency services) shall normally be by means of the access doors specified in Section 4.3.18a.
Where the doors do not give direct external access, each driver's cab shall be provided with an appropriate means of evacuation or at least one of the side windows shall have sufficient dimensions to allow for the release of trapped persons after the glass is removed or broken.