Question to the Department for Transport:

To ask the Secretary of State for Transport, how many of the investigations undertaken by the Rail Accident Investigation Branch since 2010 have involved people working under a zero hours contract.

The RAIB does not routinely record contractual terms as part of every investigation. RAIB investigations are guided by individual events, and their recommendations form part of a culture of learning and continuous improvement which has led to the UK having one of the best railway safety records in Europe.