I have just seen a few youtube videos of some ridiculous flying, in central london and near airports. The problem is no-one will do a thing about it until an accident occurs. Someone was prosecuted a couple of weeks ago but the CAA just tell you to report drone issues to the local police. And its not as if they have extra staff available to find a drone user who can't be seen and can't be found.
I'm not sure what the solution is, but there should be very heavy fines, possibly even prison sentences for inappropriate drone use within controlled airspace and near aircraft etc.
Look up a guy called Michael Button on youtube, he flies his drone all over the place and when brought up about it, he tells people to f off and laughs it off as if its insignificant. He's been reported numerous times but nothing has happened to him yet. Fingers crossed he doesn't cause an accident one day.
heres one from Greenwich i think it is.
https://youtu.be/ejA6kiGMtr4