At first I thought it was a kind of snowed-in Overlook Hotel gig, but "Starting in April, the couple will spend six months living on this 1,100 acre island", so during summer. Also, not exactly uninhabited: "...five holiday cottages and a small café on Great Blasket, which the new caretakers will oversee".
People can also apply to become "Calf of Man Ornithological Wardens" - <a href="https://www.bbc.com/news/world-europe-isle-of-man-45965251" rel="nofollow">https://www.bbc.com/news/world-europe-isle-of-man-45965251</a>