I had to look at the source code for the webpage. In chrome 'View>Developer>View Source'

In general the Daily Mail is pretty bad about this stuff - they leave articles undated, make small edits to move them up google SEO and other app ratings etc. It is a truly despicable practice. I have even heard the rumor that they do it sometimes to try to move markets, as a number of funds run automated news scrapers that can 'catch' stories like this and make trades instantly.