3 years ago police cuts removed 50 specialist officers from airport flightpath protection. Originally deployed to counter the perceived terrorist manpad threat, would have been useful to instead expand remit to counter the well-warned drone threat. All I could find was this Reuters article. There must be more in the public domain somewhere.
https://uk.reuters.com/article/uk-britain-security-police-exclusive-idUKKBN0TN0Q320151204
"Known as Flight Path Protection Teams (FPPT), the British police units were set up in 2008 to find and negate the threat from locations near airports where militants could fire Manpads or similar weaponry at planes as they take off and land.
They also work with local communities to collect intelligence about any suspicious activity.
Police chiefs plan to reduce their number from about 50 officers around the country to two constables based in London because they have assessed that there is currently minimal risk of such attacks, the two sources told Reuters."