Until the visit described here and on related pages, I have never visited Skokholm, but felt that I wanted to do so after joining the Wildlife Trust for South and West Wales. The most recent (and so far the one and only) visit happened from 30 April to 4 May 2018. The Walking Notes and the Birds List give more details.
See also entry on birdingplaces.eu.
Marnix's Bird Gallery 