The territory serves an important role as a station for signals intelligence and provides a vital strategic part of the United Kingdom communications gathering and monitoring network in the Mediterranean and the Middle East.https://en.wikipedia.org/wiki/Akrotiri_and_Dhekelia

Useful references

* http://www.philenews.com/eidiseis/politiki/article/613094/sto-symboylio-exoterikon-ypotheseon-tis-ee-o-ypam-eikones * Israel’s NSO: the business of spying on your iPhone