I would think it counts as fair use. Some might say that if the whole page was readable versus just the headline that might not be fair use. (But it's likely not readable in a low resolution image, and could even be blurred while leaving the headline readable.)
At the worst, if some court rules that it's not fair use then create a new version of the story, which replaces the image with a description of what the image was and a comment that the image had to be removed due to a DMCA request by the Sunday Times. Then send them a link to that new version to the Sunday Times to thumb your nose at them.