Speaking to the Today Programme on Friday, the head of UK Air Traffic Control, Richard Deakin said that, typically, his staff would encounter one unidentified flying object per month. But what sort of objects could UFOs be?

Nick Pope, UFO expert and former UFO investigator at the Ministry of Defence, told the Today programme presenter, James Naughtie that he had received around "two or three hundred UFO reports each year, most of which turned out to be misidentification of aircrafts".

He noted that "anything flying in our airspace that we can't identify is of interest to the government and the military, but is more likely to be Russian than Martian."

or the martians are Russians....