Summary of testimonies (subject to the protection of identity of the persons)—

• railway staff, including contractors;

• other witnesses.

The safety management system—

• the framework organisation and how orders are given and carried out;

• requirements on staff and how they are enforced;

• routines for internal checks and audits and their results;

• interface between different actors involved with the infrastructure.

Rules and regulations—

• relevant F1international and national rules and regulations;

• other rules such as operating rules, local instructions, staff requirements, maintenance prescriptions and applicable standards.

Functioning of rolling stock and technical installations—

• signalling and control command system, including registration from automatic data recorders;

• infrastructure;

• communications equipment;

• rolling stock, including registration from automatic data recorders.

Documentation on the operating system—

• measures taken by staff for traffic control and signalling;

• exchange of verbal messages in connection with the occurrence, including documentation from recordings;

• measures taken to protect and safeguard the site of the occurrence.

Man-machine-organisation interface—

• working time applied to the staff involved;

• medical and personal circumstances with influence on the occurrence, including existence of physical or psychological stress;

• design of equipment with impact on man-machine interface.

Previous occurrences of a similar character.