Royal experts have claimed Prince Harry and Meghan Markle would "ruin" the King's coronation if they attended the ceremony in May.

It is understood that the couple have received an invite to the event - but it is not confirmed if the Duke and Duchess of Sussex will fly back to Britain to attend.

Speaking to GB News, author Tom Bower claimed that King Charles would be overwhelmed if the pair attended the ceremony.

He also said people were "sick" of Prince Harry and Meghan and would prefer they steer clear of the momentous occasion.

According to The Mirror, Bower said: "If the King allows Harry to come to the coronation, it is going to ruin the coronation. 

"It'll be overshadowed by Harry's presence and Meghan's too.

"I think his behaviour now is going to irritate people again. People will be sick to death of him, hopefully very soon."

The coronation will take place at Westminster Abbey on May 6.