"Shipshape and Bristol fashion" means in perfect order, meticulously organized, everything in its proper place. It's a British idiom praising thoroughness and seaworthy standards.
Bristol was a major Atlantic port (slave trade, tobacco, sugar, later industrial). Ships faced:
Vessels had to be impeccably maintained—rigging taut, hulls clean, cargo lashed, stores secured—to survive grounding at low tide and depart on the next high. "Shipshape" = ship condition. "Bristol fashion" = the exacting standard Bristol demanded.
Early 1800s in naval logs and merchant correspondence. By mid-century, migrated to general English as a metaphor for any well-run system.
The phrase survives because it evokes a specific, tangible standard—not just "tidy," but seaworthy. In a world of half-measures, "Bristol fashion" still means no corners cut.