Only been once, 22.9.91 Wind was west force 6-7 after a SW gale. Imagine it's best in NW after Sw. As I remember that was/is a big concrete 'hide' /wartime battery. We had a long-tailed skua, 1 pom, 13 arctic skuas,, 12 great skuas, a great shearwater, 9 sooties, 4 Balearics, 2000 Manxies, 2 storm petrels, 1 Leaches, , a sunfish and a leatherback turtle, a phalarope sp, 1 black-throated diver and 5 red throateds, and also saw a sorry dunlin chased and killed by a whole family of peregrines. One of my better morning's work. Doubt it's like that all the time though.