For Drones weighing below 250g without having a camera, neither ID is important. Having said that, you continue to really need to comply with the UK’s drone legislation. In accordance with the Drone Code, this means sustaining visual contact with your drone, flying no better than 120m above the bottom, https://www.aeroindustrial.com/product/dji-matrice-3td-con-dji-care-basic-1-ano/