Prince Harry’s US immigration records should be unsealed in the light of revelations about drug-taking in his recent book, a conservative think tank will argue in a federal court next week.

The Heritage Foundation is suing the US government to find out if it acted according to procedure when it granted the Duke of Sussex a US visa. Under US immigration law, evidence of past drug use can be grounds to reject an application.

The case will be held in front of a federal judge on June 6 at the US District Court for the District of Columbia.

[I’m unsure of the timing, but didn’t Harry get the visa *before* the publication of the book? It would be hard to fault Homeland Security or State retroactively for issuing a visa prior to making those admissions. And here’s another question — who really cares? Doesn’t Heritage have better things to do than involve itself in the royal media mess? — Ed]