1. St Tudwal's Island West is a narrow island, measuring some 650 metres by 167 metres at its widest. The centre of the island is situated about a kilometre south west from the centre of its sister island, St Tudwal's Island East (NPRN 3027), and about a kilometre east of the southern tip of the Lleyn Peninsula. The island is home to a lighthouse (NPRN 96665), who's cottages are now privately owned and used as a holiday home.
M. Ryder, RCAHMW 30th August 2018.

2. St Tudwal's Island West is a study site within the EU-funded Ireland Wales CHERISH Project 2017-2021.

New LiDAR survey of St Tudwal's West: 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 St Tudwal's West, 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).

Reference:

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