The British government has summed Russian Ambassador Andrei Kelin, shown in 2014, to London to express its displeasure over Russian drones entering NATO airspace. Britain’s government said Monday it has summoned the Russian ambassador in London following Moscow’s “unprecedented violation” of NATO airspace. The Foreign Office called the incursions into Polish and Romanian airspace in recent days “unacceptable” and summoned Andrei Kelin, the Russian ambassador. Significant and unprecedented violation of Polish and NATO airspace by Russian drones last week, followed by a further incursion into Romanian airspace on Saturday, was utterly unacceptable, the ministry said in a statement. Multiple Russian drones crossed into Poland on Wednesday in what European officials described as a deliberate provocation, causing NATO to send fighter jets to shoot them down.