I suspect headlines are generally written by the editor, not the person that writes the article.

First sentence of the article: "A recently completed affordable housing development in North London is now home to 96 households that were previously identified as homeless, according to the council." The article itself doesn't say the people are homeless, only the headline says that.

The headlines are written to be click-bait so they'll get shared. Because of this, many times a headline isn't accurate to the article. In this case it's just a little bit careless, but sometimes headlines make a fairly innocuous story become very contentious for those that only read headlines.