CAMRA maintains a "National Inventory" of historical notability and of architecturally and decoratively notable pubs. The National Trust owns thirty-six public houses of historic interest including the George Inn, Southwark, London and The Crown Liquor Saloon, Belfast, Northern Ireland.

Answer this question, if possible (if impossible, reply "unanswerable"): What body maintains a National Inventory of notable pubs?
CAMRA