For drones weighing a lot less than 250g and not using a digicam, neither ID is necessary. That said, you still must comply with the UK’s drone laws. Based on the Drone Code, this means protecting visual contact with your drone, traveling no greater than 120m over the bottom, remaining https://www.aeroindustrial.com/product/dji-matrice-350-rtk-combo-con-dji-care-basic/