Prince Harry's Relationship With King Charles Has 'Deteriorated' 'to a New Low Level' Amid Duke’s Constant 'Security Requests'

King Charles III seems to have "finally" joined the other senior royals in pretending that Prince Harry does not exist.

"Prince Harry’s relationship with his father has deteriorated to a new low level," a source spilled.

Although Harry is bogged down in a bitter feud with nearly all of his family, it is suggested the only senior royal he (at one time recently) communicated with was Charles III. The monarch even decided to meet with his youngest son back in February, one day after his cancer diagnosis was made public. Some reports suggest the pair only met for 12 minutes, and the King declined to see his rebel son again when the Duke visited Britain on May 8 for an Invictus Games event.

The fifth in line to the throne is said to be "adamant" in his determination to get in touch with his father, as he reportedly feels that both he and his family could be in danger.

"Harry is frightened and feels the only person who can do anything about it is his father," a Sussex source spilled to an outlet.

Another source came forward and stated: "Harry is determined to protect his own family at all costs."

This led the first insider to dish about how the King and his "spare" are "at loggerheads over Harry's security requests and are no longer communicating," before revealing: "Harry has genuine security concerns about the safety of his family in light of Princess Diana’s death and feels that his father can help him in his ongoing battle with RAVEC (the entity that oversees security)."

Royal security is tied to the annual Sovereign Grant, and administered by the government. As a hereditary monarch, King Charles cannot compel the elected British government to take action solely because Harry needs something. His Majesty can guide, warn, suggest and ask his government, as opposed to issuing a royal command the electorate must follow.

These insights follow additional reports that claim Harry is allegedly using his children, Princess Lilibet and Prince Archie, as a form of "emotional blackmail" against their estranged grandfather.

Pals of the monarch told a publication that the Duke of Sussex is exerting this "nefarious tactic" to convince his father that the Sussex family needs top-of-the-line security in the U.K. or His Majesty will never meet his grandkids again.

"Harry has lost his security case in court and is now trying the emotional blackmail route to get what he wants instead, cynically using the threat of Archie and Lilibet never meeting their grandfather again as a tactic to coerce the king into overruling RAVEC," a friend of Charles III shared.

ET reported on the source revelations.