Allira
They should not report it until it can be verified as fact.
Posters accuse the Daily Mail of sensationalism and scaremongering but the Guardian is no better.
I doubt that is the case here Allira. It’s not a palatable piece of journalism in that this isn’t information any of us want to hear, but that doesn’t mean it’s badly researched, untrue or sensationalised. Regardless, there will be full details of the report when it’s published - and no doubt the Guardian will be admonished if they have it wrong in citing Brexit as a/the reason.