A new picture shows the Queen holding virtual audiences as she recovers from Covid.
Her Majesty felt well enough to speak to foreign diplomats after postponing a number of similar engagements last week.
There were concerns for the frail 95-year-old monarch after she tested positive on February 20.
Buckingham Palace said at the time she was experiencing ‘mild cold-like symptoms’.
On Tuesday, she received His Excellency Mr Carles Jordana Madero via videolink from her Windsor Castle home.
He presented the Letters of Recall of his predecessor and his own Letters of Credence as ambassador from the Principality of Andorra to the Court of St James’s.
She also welcomed His Excellency Mr Kedella Younous Hamidi, who presented his Letters of Credence as ambassador from the Republic of Chad to the Court of St James’s.