For drones weighing less than 250g without having a digital camera, neither ID is essential. Having said that, you continue to have to comply with the united kingdom’s drone laws. According to the Drone Code, What this means is maintaining visual contact with your drone, flying no better than 120m https://www.aeroindustrial.com/product/dji-matrice-3td-con-dji-care-plus-1-ano/