Today we were unlucky, but remember we have only to be lucky once, you will have to be lucky always.” The IRA’s statement after its bomb exploded in a bathroom on the sixth floor of the Grand Hotel, Brighton, in October 1984, was cleverly sinister but, with its repeated emphasis on luck, oddly airy. It took responsibility off the shoulders of the killers and placed it on those of Dame Fortune.
Yep, according to this Guardian article.