Where to research Western Approaches wargaming rules

Where should researchers look for the rules used in Western Approaches anti-submarine simulations?

Start with the National Archives and the Western Approaches Museum in Liverpool.

A modern researcher trying to recreate the wartime tactical rules should begin with the National Archives, where surviving official records and exercise material would be expected. The Western Approaches Museum in Liverpool also holds relevant material. Together they offer a concrete research path for reconstructing the team's anti-submarine simulations. The surviving rules would connect modern wargaming interest with the methods used by the wartime unit.