According to The Guardian’s article, “Theresa May calls for UK general election on 8 June:”

The prime minister later repeated her suggestion that she was taking the decision reluctantly, arguing that she had decided to go for the election last week. “Before Easter I spent a few days walking in Wales with my husband, I thought about this long and hard and came to the decision that to provide for that stability and certainty, this was the way to do it,” she told ITV’s political editor, Robert Peston.

Of course this reminds me of Maurice Wilkins’ decision to star working on DNA, which he describes in his book Maurice Wilkins: The Third Man of the Double Helix:

Before returning to the lab after Christmas 1950 I had taken Edel [his wife] on a short holiday in the Welsh mountains. The mild winter sun shone clearly on the peaks covered with snow. We had fine talks, and in the evenings we read Jane Austen together. The beautiful atmosphere seemed to clarify my thoughts, and I remember very well how, one morning after breakfast, I stood looking at the mountains in the distance and thoughts of research drifted into my mind. I suddenly came to see that my interest in following with microscopes the movements of DNA in cells was based on vague ideas. What were we really aiming at? I could see no way in which my fascination with microscopes and living cells could lead to a meaningful program of research….

[I]t came to me clear and strong, and my mind was made up. I must give up completely the microscope work and concentrate full time on X-ray structure analysis of DNA.

Clearly there’s something about walking in Wales. I hope to try it myself some time!