https://www.theregister.co.uk/2018/10/30/civil_aviation_authority_ground_dji_matrice_200_series/

The UK's Civil Aviation Authority has temporarily grounded DJI's Matrice 200 following reports of the commercially used drone suffering a complete loss of power mid-flight and crashing to Earth.

Chinese firm DJI has admitted its engineers are "urgently" probing customer claims related to the waterproof quadcopter series, which was released in 2017 and is used for surveying and by emergency services.