At less than half a mile, it must be the shortest post round in Britain – but it’s by far the grandest.
Horse-drawn Brougham carriages trot between Buckingham Palace and St James’s Palace to deliver and collect the King’s mail.
Our exclusive pictures show a driver and footman – wearing traditional livery, including top hats and beige jackets – on the twice-daily runs.
An onlooker said: ‘At least Charles doesn’t have to put up with the postal delays suffered by the rest of us. He gets a more reliable service by horse and carriage.’
Read more: Taking the piss: New pictures reveal the horse-drawn carriages used to deliver letters between Buckingham Palace and St. James’ Palace for 180 years