The Blockhouse

THE BLOCKHOUSE

Listed on the National Heritage List for England. Search over 400,000 listed places

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Overview

Heritage Category:
Listed building
List Entry Number:
1219196
Date first listed:
14-Dec-1992
Statutory Address:
THE BLOCKHOUSE
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Location

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Archive image, may not represent current condition of site.
Date:
2001-09-23
Reference:
IOE01/05602/20
Rights:
© Mr Bernard Stradling. Source: Historic England Archive

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Official list entry

Heritage Category:
Listed building
List Entry Number:
1219196
Date first listed:
14-Dec-1992
Statutory Address 1:
THE BLOCKHOUSE

Location

Statutory Address:
THE BLOCKHOUSE

The building or site itself may lie within the boundary of more than one authority.

District:
Isles of Scilly (Unitary Authority)
Parish:
Tresco
National Grid Reference:
SV 89730 15462

Details

TRESCO

SV81NE The Blockhouse 1358-0/1/119

II

Blockhouse. Probably 1548-52. Roughly coursed granite rubble. Rectangular plan. Top of the platform is enclosed by walls, originally surmounted by a parapet with embrasures. Stairs to east. Winder stairs to original lean-to in south-east corner, with plain granite open fireplace; remains of later room constructed in south-east corner of platform. Covers Old Grimsby Harbour, and is probably one of the blockhouses built on Tresco under Sir Francis Fleming, and later John Kiligrew, captain of Pendennis Castle, between 1548 and 1552. Scheduled as an Ancient Monument. (P Laws: The Buildings of Scilly: Redruth: 1980-: 6; B.H. St.J.O'Neil: Isles of Scilly: London (HMSO): 1950-: 20).

Listing NGR: SV8973015462

Legacy

The contents of this record have been generated from a legacy data system.

Legacy System number:
62554
Legacy System:
LBS

Sources

Books and journals
Laws, P, The Buildings of Scilly, (1980), 6
O'Neil, BH St J, Isles of Scilly, (1950), 20

Legal

Ordnance survey map of The Blockhouse

Map

This map is for quick reference purposes only and may not be to scale. This copy shows the entry on 05-Jun-2026 at 09:55:04.

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© Crown copyright [and database rights] 2026. OS AC0000815036. Use of this mapping is subject to Terms and Conditions.

End of official list entry

All text content is available under the Open Government Licence v3.0 , except where otherwise stated. Any supplied maps are © Crown Copyright [and database rights] 2026 OS AC0000815036 and may not be reproduced without permission.

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