Britain says it will spend more than $2 billion on cybersecurity and recruit 1,000 more intelligence officers as the country’s intelligence services warn of increasingly aggressive espionage tactics by Moscow, a charge the Kremlin denies. The $2.3 billion investment is aimed at countering emerging threats to national security. British Chancellor of the Exchequer, Philip Hammond, said this week that key infrastructure, such as air traffic control systems and electricity grids, could be...