On April 5, 1968, Flight Lieutenant Alan Pollock stole a Hawker Hunter and slipped away from his squadron without permission. Flying barely above the treetops, he threaded the powerful transonic fighter toward London while government officials debated aviation noise inside Parliament.

Defence minister Al Carns told MPs that the Yantar - part of a Russian fleet collecting data on underwater infrastructure - is a 'threat to our economics and our way of life'

Britain says Russia’s Yantar ship targeted RAF pilots—but the real threat lies under the sea. How vulnerable are the UK’s vital undersea cables to attack?