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Image Credit: Colchester Archaeological Trust
Tudor Coastal Fort to Be Investigated Before Erosion Claims the Site
Archaeologists are preparing to uncover the remains of a Tudor coastal fort on Mersea Island in Essex, East of England, in an effort to record the site before it is lost to coastal erosion.
The Tudor blockhouse was constructed in 1543 during the reign of Henry VIII to defend the entrance to the Colne estuary, an important maritime route on England’s east coast. A small artillery garrison equipped with 12 guns once operated from the fort, reflecting the growing importance of gunpowder warfare during the Tudor period.
The fort formed part of a wider programme of coastal defence introduced under Henry VIII as England strengthened its shoreline against potential overseas threats during a period of shifting alliances and military tensions in Europe. Unlike many earlier medieval fortifications, these structures were designed specifically to accommodate artillery and control access to strategic waterways.
Volunteers have been invited to take part in the five-week excavation, which aims to investigate and document the surviving remains. According to project organisers, recording the site has become increasingly urgent due to ongoing coastal erosion.
Although the blockhouse’s cannons were removed in 1553, the structure remained important for centuries. It was repaired during preparations against the threat of the Spanish Armada in 1588 and later played a role during the English Civil War in 1648.
Beyond its military use, the blockhouse also served briefly as a local court where fishermen were prosecuted for dredging outside permitted seasons, reflecting how defensive structures sometimes developed secondary civic functions.
The fort later faced demolition under orders from Oliver Cromwell, but survived after opposition from the local landowner. Today, the site remains a rare example of Tudor coastal military architecture.
The excavation at Cudmore Grove Country Park has been organised by Essex County Council and will be led by Colchester Archaeological Trust with funding from the Department for Environment, Food and Rural Affairs.
Unlike the stone fortresses often associated with the Tudor period, the Mersea defences were constructed largely from mud and timber, offering archaeologists a rare opportunity to study a less familiar form of coastal fortification.
Published on: 22-05-2026
Edited by: Abdulmnam Samakie
Source: BBC
