For drones weighing below 250g with out a camera, neither ID is essential. Having said that, you still need to adjust to the UK’s drone laws. Based on the Drone Code, This implies sustaining Visible contact with your drone, traveling no larger than 120m over the bottom, remaining at least https://www.aeroindustrial.com/product/czi-gl10-plus-reflector-matrice-350-rtk/