Question to the Department for Transport:

To ask the Secretary of State for Transport, pursuant to the Answer of 13 March 2019 to Question 230103 on Southern, how many Southern services ran without an on-board supervisor in (a) 2017, (b) 2018 and (c) 2019 for the (i) whole and (ii) part of their journey.

In 2017, 1.6% (around 4,300) of Southern services scheduled to run with an OBS ran without an OBS for their whole journey, and 2.2% (around 5,900) ran without an OBS for part of their journey.

In 2018, 0.4% (around 1,250) of Southern services scheduled to run with an OBS ran without an OBS for their whole journey, and 1.0% (around 2,900) ran without an OBS for part of their journey.

In the figures for January and February 2019, 0.1% (around 50) of Southern services scheduled to run with an OBS ran without an OBS for their whole journey, and 0.5% (around 225) ran without an OBS for part of their journey.