Source: Daily Mail A top-secret British spy plane was tracked using a £2.99 mobile phone app  The £650 million RAF aircraft, called Rivet Joint, could be seen at 27,000ft  Monitered as it tried to gather intelligence about a Russian base on the Baltic Sea By MARK NICOL A top-secret British spy plane was tracked … Continue reading Plane spotters with £2.99 app expose top secret UK spy plane off Russia: Highly-classified mission involving £650m aircraft is watched by thousands online