The House of Lords is currently talking, at length - this has been going on for months already - about the need for legislation around drone use. The most recent suggestion is that all drone users be registered and all drone flights logged.
The proposals, according to The Guardian, will require users to log flights through an app. Logistically, this makes a lot of sense as the app can send location information to the officials automatically. And flight times could be recorded along with that, then, in the case of public complaint or injury you may well get a knock on the door from Plod.
Once such a law is in place, anyone found not registered or not having logged their flight might have their drone "captured" and taken away.
The law is in place to prevent public injuries, which is a legitimate concern, and spying on people or companies, which is less legitimate because laws already exist to protect those rights. There's very little evidence to suggest anyone is spying on anyone else with drones at the moment, but it's a statistical likelihood that a drone will eventually hurt or kill someone.
In the future, of course, it could be made mandatory for all drones of a certain size and weight to report their GPS locations and flight times automatically. DJI drones, for example, could probably do this easily through the app, if they were legally compelled to do so.
Drone owners, prepare for some very tough legislation.