Prince Charles and Duchess of Cornwall start their India visit on 6 November. (Photo: REUTERS)

Prince Charles and Camilla, the Duchess of Cornwall, have embarked on a tour of India in what has been described as their most extensive visit to the country to date.

Charles and Camilla arrived in New Delhi on 6 November to begin their nine-day visit to India aimed at strengthening Indo-Britain ties. Prince Charles is visiting India for the eighth time, while it is the fourth visit for the Duchess of Cornwall.

Ahead of their arrival, Clarence House has released the detailed itinerary of the royal couple.

"Their Royal Highnesses will undertake a broad range of engagements to promote the strong UK-India partnership in key areas such as conservation, education, growing business links, women's empowerment and training," Clarence House said in a statement.

"They will also have the opportunity to celebrate religious diversity, creativity and the vibrant individual family ties between the two countries."

In Delhi, Charles and Camilla will meet the President and Vice President and of India in addition to visiting one of the world's largest Hindu temples.

In Mumbai, they will meet senior business leaders and will visit a ground-breaking mobile crèche.

In Pune, the royal couple will visit a world-leading inoculation factory while in Kochi their itinerary includes a visit to the oldest synagogue in the Commonwealth and an off-road trip into an "elephant corridor."

Prince Charles and Camilla will also spend a private day in the picturesque Kerala.

Dehradun will be the most important leg of their India tour as they visit three world renowned institutions in the city: The Indian Military Academy, The Forest Research Institute and the Doon School, where local women are being helped to finance their own self-employment projects.

The royal couple's India visit ends on 14 November, when they will start their Sri Lanka tour to officially represent the Queen at the Commonwealth Heads of Government Meeting (CHOGM) in Colombo.