Which brake must be fully applied when setting out the trailing locomotive at Buddwood?

When setting out the trailing locomotive at a location such as Buddwood, it is essential to ensure that the independent brake is fully applied. The independent brake, which is controlled by the engineer, is specifically designed to hold the locomotive secure while it is stationary, independent of the train's automatic brake system. This is particularly important in situations where the train might be on a grade or uneven surface, as it helps prevent any unintended movement of the locomotive as it is being set out.

The independent brake acts directly on the locomotive's wheels and is often used when the train's automatic brakes are not in use or need to be released for the locomotive to move independently. The other braking systems, such as the automatic brake and dynamic brake, serve different functions and may not adequately secure the locomotive when it is being separated from the train. Therefore, using the independent brake is the safest and most effective method for securing the trailing locomotive during this operation.