They did provide the link. The image is apparently from a period predating the time when the current consensus that disallows depiction of the Prophet originat

They did provide the link. The image is apparently from a period predating the time when the current consensus that disallows depiction of the Prophet originated. Back then it was ok; now it isn’t. Were The Guardian to print the image, it could be construed by some interested party (of various possible affiliations) as a willful act intended to cause offense. For precedent predating our current excessively charged social environment, the film The Message (1976), starring Anthony Quinn, does not show his person at all. https://www.imdb.com/title/tt0074896 https://www.imdb.com/title/tt0074896