Police launch huge security operation ahead of King Charles III's arrival for Australian tour

Police have launched a major security operation ahead of the arrival in Australia of King Charles III and Queen Camilla today for their royal tour.

The royal couple are scheduled to arrive in Sydney about 7pm for a short tour of the country ending next Wednesday.

New South Wales Police today launched Operation Royal Visit for the visit, drawn up following months of planning.

The force has worked with other law enforcement agencies, including the UK Royal and Specialist protection team, responsible for safeguarding the royal family.

Members of the public will have several opportunities to see the royal couple during their stops in Sydney and Canberra.

Officers will be deployed throughout the operation to manage the movement of the King and Queen between engagements, and to ensure the safety of visiting dignitaries and the community.

The public is being warned to expect traffic diversions and road closures throughout the royal visit.

Police are also reminding people to familiarise themselves with rules relating to operating drones in restricted areas and no-fly zones.

The trip will also be the most significant journey abroad since the 75-year-old King Charles was diagnosed with an undisclosed type of cancer back in February.

The monarch has paused his cancer treatment for the trip to Australia and Samoa, where they will attend the Commonwealth Heads of Government Meeting.

Royal officials say his health will be monitored closely, with doctors even bringing a supply of his blood.

The itinerary has been scaled back on medical advice, allowing the King to rest after the long flying time and to adjust to the climate.