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Site Details

© Copyright and database right 2020. All rights reserved. Ordnance Survey licence number 0100022206

NPRN 402783

Map Reference SH12SW

Grid Reference SH115222

Unitary (Local) Authority Gwynedd

Old County Caernarfonshire

Community Aberdaron

Type of Site ISLAND


Period General

Site Description 1. "Bardsey Island (Ynys Enlli) lies across the Sound about two miles (about 3km) off the tip of the Ll'n Peninsula in North Wales. It is 1.5 miles (2.5km) in length and, at its widest point, it is just over half a mile (1km) across. The mountain, Mynydd Enlli, rises to a height of 167m. It covers an area of 180 hectares, most of which is farmed. The island was bought by the Bardsey Island Trust in 1979. It is managed by the Trust in conjunction with the Countryside Council for Wales and CADW. Bardsey is a National Nature Reserve, Site of Special Scientific Interest and part of the Llyn Environmentally Sensitive Area."

Information from website of Bardsey Island Trust, 2005.

T. Driver

2. Bardsey Island is situated approximately 3km southwest of the tip of the Llŷn Peninsula, separated from the mainland by Bardsey Sound. The island has been owned and maintained by the Bardsey Trust since 1979 with advice from CADW and Natural Resources Wales (NRW) regarding the Island’s status as a Site of Special Scientific Interest (SSSI) and the various scheduled ancient monuments and buildings on the island. Bardsey Island is a study site within the EU-funded CHERISH Project 2017-2021.

New LiDAR survey of Bardsey Island: In February 2017, Bluesky, a company specialising in the acquisition of aerial survey data, was commissioned by the CHERISH Project to collect 0.25m “leaves-off” (winter conditions with low vegetation and bare trees) LiDAR (airborne laser scanning) data of six Welsh islands at low tide. This included a new survey of Bardsey, allowing its archaeology to be analysed and mapped to a high degree of accuracy. Bluesky flew from its East Midlands base and collected the data using its Teledyne Optech Galaxy LiDAR system on 24 February. The processed data is archived with the Royal Commission (Driver and Hunt 2018).


Kenney, J and Hopewell, D. 2016. Ynys Enlli Heritage Management Plan. Gwynedd Archaeological Trust, Report No. 1304. Unpublished.

Driver, T. and Hunt, D. 2018. The White Ribbon Zone. RICS Land Journal. February/March 2018. pp. 22-3

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