For drones weighing fewer than 250g with no digicam, neither ID is necessary. Having said that, you continue to really need to adjust to the UK’s drone laws. In accordance with the Drone Code, This suggests maintaining Visible connection with your drone, flying no better than 120m over the ground, https://www.aeroindustrial.com/product/dji-matrice-350-rtk-propelas-2112-high-altitude-low-noise-par/