Drones are a very popular way of smuggling drugs and phones into gaol. They help interns getting phones into prisons so that they can still control what is happening in the outside world. In short: a criminal can continue being a criminal.
Drones are used so that even though someone is in prison he or she can still continue their bad businesses (most often selling drugs) without much interruption. Now that the guards have realized what is happening, they make sure that every one that visits isn’t part of what they are doing outside prison.
There are 80,002 people in UK prisons today. This means that 80,002 people could be selling drugs, using their phones, even though they are locked up in prison. Of those, there are 9,176 women in prison and 70,826 men. Altogether,that’s a lot!