Drone laws vary in different countries. If your drone weighs over 250 grams, you will need to register to fly with the CAA in the UK. As part of the UK drone laws 2019, this law became effective as of 30th November 2019. Weighing under 250g, DJI Mavic Mini and SG907 drones are small enough to fit in the palm of your hand. With these drones, you will be within uk drone laws under 250g, which means they can be flown without the need for registration as a hobbyist. However, if you will be using your drone for commercial purposes, you will be required to gain the necessary qualifications. If you want to fly commercially, meaning you will use your drone to generate some form of income; you will need to take the PfCO CAA (Permission for Commercial Operations) exam. Make sure to familiarise yourself with the Drone Code and the Drone Registration Scheme before you fly a drone in the UK. Registering your drone requires you to pass an online theory test and costs just £9 a year.