The owner's manual certainly confirms this:
The stop-start system helps to save fuel and to reduce the exhaust emissions. When conditions allow, it
switches off the engine as soon as the vehicle is at a low speed or at a standstill, e.g. at a traffic light or in a traffic jam. It starts the engine automatically as soon as the clutch is depressed. A battery sensor ensures that an Autostop is only performed if the battery is sufficiently charged for a restart.'
I never use the thingbut others have reported that the feature fails to work during a DPF regen.
2015 2.2 CDTi SENav 163ps manual 4x4 in Carbon Flash with 19\" alloy spare towing a Bailey Unicorn III Madrid @ 1500kg.