Sky News reports:

Sophisticated drones sending "overwhelming amounts" of drugs and weapons into prisons represent a threat to national security, according to an annual inspection report by the prisons watchdog.

HMP chief inspector of prisons Charlie Taylor has warned criminal gangs are targeting jails and making huge profits selling contraband to a "vulnerable and bored" prison population.

Drones are becoming an anti-social nuisance and there is clearly a need for 'no-drone' areas e.g. around prisons and airports.

A drone delivery service to prisons makes a mockery of incarceration and could threaten the lives of both inmates and staff.

What is needed is a similar kind of invisible electronic fence to that used to keep out unwanted animals from gardens.