According to The Daily Mail, Thomas Markle has slammed his daughter Meghan Markle and her husband Prince Harry for missing Prince Philip’s memorial ceremony on March 29, calling the omission “unforgivable.”

According to sources, Prince Harry, who is presently involved in a legal battle with the Home Office over inadequate security, skipped his grandfather’s memorial because of the same issue.

Meghan’s father has responded to the snub in a new YouTube video a week later.

“Attending and giving respect and giving God’s grace to Prince Philip for a lifetime of service was very important to the Queen, and for them to not show up was a slap in the face to the Queen,” said Thomas.

He went on: “It was unforgivable. The British people won’t forgive them for that, and they shouldn’t. I don’t know what the reason was, but there’s no excuse at all. It’s a slap in the face for the Queen and the British people.”

The comments come as a majority of royal experts also turned their guns on Harry and Meghan for missing the service, which was attended by numerous European royals and dignitaries, as well as disgraced Prince Andrew.