Civilian planes flying over British airspace are at risk from Russian jets playing a highly dangerous "game of chicken" in the skies, a former head of the armed forces has warned.
Air Chief Marshal Lord Stirrup, a former chief of the defence staff, said that recent flights by Russian long-range Bear bombers off Bournemouth and the coast of Cornwall were part of a strategy to probe UK defences. But he warned that the new levels of activity posed a risk, not just to the RAF planes sent to intercept them but also to civilian air traffic.
"They are becoming more aggressive," he told Sky News. "These aircraft - Russian Bears, for example - are not going on these flights simply as joy rides. They are mission rehearsals. These aircraft launch stand-off missiles against Western targets and just as they used to do in the Cold War, they are practising those profiles.
"They are testing us, they are testing our defences, they are testing our reactions and they are engaging to a degree in a game of chicken and that's very dangerous."
He added: "We are seeing the possibility of mid-air collision, not between RAF and Russian aircraft, but between Russian aircraft and civilian aircraft increasing." Last month the Foreign Office said Russian bombers flying near UK airspace had caused "disruption to civil aviation" for the first time, leading to the country's ambassador being summoned to explain the situation.