British naval intelligence operated throughout the 20th century and had earlier precedents. An official founding date therefore needs care: established practices can predate the organization named in a formal chronology. Andrew Boyd is recalled joking that his book covers the roughly 15 percent of British naval intelligence he is allowed to discuss. The stated length of 776 pages makes the remark a comment on the scale of the subject and the limits of disclosure, rather than a measured estimate of the whole intelligence record.
Chapter · 19:30-24:49
Royal Navy intelligence before official start dates
British naval intelligence extends beyond neat institutional founding dates, while Andrew Boyd's remark about disclosure limits shows why even a large history can cover only part of its subject.