The company formed in 1876
The Tollesbury and Mersea Native Oyster Fishery Company was incorporated on 15 December 1876 to manage and cultivate oyster grounds in the Blackwater. At the time the trade supported around 640 men and 120 smacks from Tollesbury and Mersea.
The Packing Shed Trust’s company history records an original capital issue of 3,000 fully paid £5 A shares, plus 3,000 £5 B shares reserved for local dredgermen. Company profits were to support a widows-and-orphans fund before any shareholder dividends. Dr Hugh Green of Strood Villa was its first chairman in 1878.
Investors held one type of share and working fishermen another. A twelve-member committee, known as the Jury, arranged dredging turns to share work between the members and supervise the handling of the catch.
How the fishery worked
Smaller oyster smacks usually carried three dredgermen, each with a dredge. Their catch was carried to the Packing Shed, where jurymen sorted oysters for the market or selected stock for relaying. Shallow layings were also worked by hand-hauled dredges from open skiffs.
Culch—shell placed on the seabed—provided the hard surface on which young oysters could settle. Removing it damaged the ground needed for future catches.
The catch was divided by what happened to the oysters next. Marketable shells were packed for sale; others were returned to the beds as stock. Work on the layings in shallow creeks was carried out from open skiffs, with the dredge hauled by hand. The company's jurymen supervised grading at the Packing Shed, while its three watch boats guarded against illegal dredging.
At the fishery's height, oysters were not simply landed and sold: the company had to keep its beds productive by returning suitable stock and maintaining the shell on the seabed. That made a carefully supervised system of dredging, relaying and protection essential to the business.
War, cold winters and depleted stocks
Fishing was disrupted during both world wars by military restrictions, mines and barriers in estuary waters. Later severe winters damaged native-oyster breeding stock. The company subsequently passed to Mac Fisheries, and many beds deteriorated through insufficient cleaning, relaying and cultivation.
The return to local management
The Blackwater Oystermen's Association was established in 1979. In 1983 the company was bought back from Mac Fisheries with support from the association. Its records estimate fewer than 10,000 native oysters remained at that stage.
Restoration included cleaning silted areas, replacing culch, importing breeding stock and building purification tanks. Oyster cultivation continues in waters that also have conservation protections for native-oyster habitat.
This company’s ownership and cultivation history should not be confused with permission to dredge wild native oysters within the separate Marine Conservation Zone. Kent & Essex IFCA’s March 2025 management report recommended continued closure of the protected-zone native-oyster fishery for 2025 and 2026 while its depleted population was assessed.
The company's heritage history sets out its early working methods and twentieth-century recovery.
Packing Shed Trust, oyster company share structure and early management