not natural law

It's in the evening because the sun is setting in the west, it's summer because of the full tree foliage, the drone is flying west to east and because of the unusually light traffic, it has to be a Sunday or bank holiday evening.

The price of electricity in the UK is astronomical.

If the drone weighs less than 250g (eg: DJI Mini 3 .. Mini 4 Pro.. etc) then all you need is an operator ID) and as long as there aren’t any flight restrictions in the area (like airports..prisons..etc) and no crowds of people, then you can fly. The rules are different for larger drones though and you can’t fly close to buildings. However, you must always be able to see your drone at all times (& without binoculars or similar) neither can you fly it more than 500metres away from you. So the answer to your question is “not legally” Some say that to achieve the distance covered in this video without losing the signal, the pilot might have used the new DJI 4G dongle. These dongles are aimed at commercial operators and are illegal for most of us. You would need a special sim card and written permission.. oh, and a special licence from OFCOM. Of course we don’t know exactly what drone etc this pilot has used because he/she hasn’t responded to any of the questions here. Hope this helps.

No, that part of it is fine. How close you can fly depends on the weight of the drone. You can fly as close as you want with a drone weighing less than 250g. But whichever drone you have, it must not be more than 500MTR away from you and you must be able to see it at all times.