Export warships and withheld design secrets

Did Britain give foreign buyers every detail of its best warship designs?

No. Export variants could omit selected refinements, including protection details retained for Royal Navy ships.

Britain did not automatically share every detail of its best warship designs. Foreign orders commonly received an export variant rather than a complete copy of the domestic specification. That distinction let a yard sell a modern ship while withholding selected protection or design refinements. Even the United States remained unaware of one British armour practice until well into the Second World War, illustrating the limits of technology transfer between friendly navies.