Overview

• The 'MI5: Official Secrets' exhibition is MI5's first public effort to reveal its history, featuring declassified files, artifacts, and spy gadgets.
• Visitors can explore key moments in espionage, including the capture of German spy Karl Muller in 1915, who used lemon juice as invisible ink.
• The exhibition addresses controversial episodes, such as the defection of Guy Burgess to Moscow and Anthony Blunt's exposure as a Soviet agent.
• Modernization within MI5 is highlighted, including its shift to counterterrorism and a workforce that was nearly 48% women by 2022.
• Interactive features allow visitors to test their potential as spies through memory and code-breaking challenges.