Jonathan Caplan KC

Career and Legal Expertise

Jonathan Michael Caplan KC (born January 11, 1951) is one of the United Kingdom's foremost barristers and King's Counsel, called to the Bar in 1973 and taking Silk in 1991. He was appointed Recorder in 1995. Caplan practices across criminal law (particularly fraud), regulatory issues, corporate liability, media law, public inquiries, administrative law, and international cases, with an extensive background in major UK public inquiries.

His career has encompassed some of Britain's most significant legal proceedings, including representing clients in the Guildford bombings inquiry, the Paddington rail crash investigation, and the Leveson Inquiry into Press Ethics. His practice extends internationally, with experience trying cases in Hong Kong and Singapore. Educated at Cambridge University (M.A. in Law), Caplan brings the rigorous analytical and evidentiary standards of a senior barrister to his UFO research.

UFO Research and Evidence Assessment

Caplan has privately researched unidentified anomalous phenomena (UAP) for over fifty years, methodically assembling and evaluating evidence using the same critical analytical approach he applies to complex legal cases. Unlike many UFO researchers, Caplan's legal training grants him expertise in evaluating source credibility, testimonial reliability, and documentary provenance — skills essential to separating credible evidence from speculation.

His research has focused on identifying patterns of official secrecy spanning from Cold War covert programs through to alleged modern-era presidential briefings and clandestine recovery operations. Caplan has cultivated relationships with "highly placed contacts" throughout his career, affording him access to information and perspectives rarely available to UFO researchers without government or military backgrounds.

"Not For Disclosure" (2026)

In June 2026, Caplan published Not For Disclosure: The Truth About UFOs, the World's Best Kept Secret through Century (Penguin Random House). The book became a Sunday Times bestseller, marking a watershed moment for UAP disclosure literature: a senior UK King's Counsel, the legal equivalent of the American "top tier" attorney, publicly presenting decades of UFO evidence to a mass audience.

Not For Disclosure synthesizes patterns of government concealment documented across multiple decades and jurisdictions. Key sections examine:

• Cold War secrecy and covert aerospace programs: Detailed analysis of how Cold War-era UFO reports were classified and compartmentalized.
• Presidential briefings and decision-making: Examination of known presidential awareness of UAP phenomena, including previously unpublished documents.
• Recovery operations and material custody: Investigation into alleged retrieval of non-terrestrial craft and implications for government knowledge.
• Majestic 12 and successor oversight structures: Critical evaluation of historical documentation related to alleged secret oversight committees.
• JFK, Truman, and Forrestal connections: Never-before-published materials linking these figures to UAP secrecy decisions.

Caplan's approach emphasizes sourcing, documentary evidence, and logical analysis rather than speculative or sensationalized claims — a deliberate departure from much popular UFO literature. As one publisher description notes, it is presented as "the most serious and sourced book ever published on the subject of UAPs."

Significance and Impact

Caplan's entry into public disclosure discourse represents a notable shift: a highly credentialed legal figure with zero financial incentive (he is already wealthy and professionally established) and zero institutional pressure (he is independent, not university-affiliated or government-dependent) publishing a comprehensive, evidence-focused work on UAP concealment. His legal background lends unusual credibility to claims of systematic official deception, as his career has been built on exposing truth through rigorous evidence evaluation in adversarial settings.

His 50-year research timeline places him among the longest-serving contemporary UFO investigators, though unlike many contemporaries he maintained a low public profile until 2026. The publication of Not For Disclosure represents the culmination of five decades of private analysis and the decision to make his evidence and conclusions public during the disclosure era.