UK facing ‘most contested and complex’ threat in decades, warns GCHQ director LONDON — Britain’s security agencies are grappling with the most “contested and complex” threat environment in decades, one of the country’s most senior spies warned on Wednesday. Speaking at the cybersecurity conference Predict Europe, Anne Keast-Butler — the first woman to lead the cyber and signals intelligence agency GCHQ — said there had been a quadrupling of the most significant cyberattacks over the past year. (Predict Europe is organized by Recorded Future, The Record’s parent company.) “How that is manifesting itself in cyberspace is with a significant uptick in the level of attacks that we are looking at,” Keast-Butler told the audience. “So we saw over four times as many attacks to September as we saw…