However many face masks were removed after the family exited the chapel.
Judi added: “The royals all seem to have highlighted one aspect of their father’s role in their lives in their tributes and that was as a man they each felt they could turn to in times of trouble.
“This has never seemed to be a role that Charles would slip into naturally now his father had gone and he must feel he has lost the kind of wise and helpful presence he might need to help his mother take the Firm through any looming problems in the years to come.
“It was the Queen who looked solitary and isolated during the service but I wonder if Charles’s tears might have been a sign that he is now feeling the same without his father to guide him.”
She wore it pinned to the front of her black coat.
Camilla was joined by guests including Kate Middleton and Sophie, Countess of Wessex.
Walking side-by-side out of St George’s Chapel, the Countess could be seen placing her hand on Kate’s back as she wiped away her tears.
The expert explained: “After an understandably sombre body language display during their arrival at the chapel, the Royal Family suddenly showed their more openly emotional side after the service was over.
“Sophie has shown herself to be a very strongly supportive and almost maternal presence in the family recently.
“And the way she pulled off her mask to walk up closer to the Queen who turned to look round on her way into the chapel suggested a very empathetic and caring approach.
“She was also seen touching Kate on the back in a gesture of support and William echoed this as his arm went out to touch his wife on the back in an affectionate gesture after the service.”