Footage shows drone delivering drugs to prisoners
16 May 2016 Last updated at 16:02 BST
Footage obtained by the BBC shows a drone delivering drugs and mobile phones to London prisoners in April.
This package, which contained drugs and phones, was recovered by prison officers after being spotted on CCTV.
The Ministry of Justice has said it "must do more" to tackle the issue, after the number of contraband items thrown in to prisons in England and Wales more than doubled in the last two years.