NEWQUAY, ENGLAND - SEPTEMBER 01: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge share a joke with construction workers as they visit Nansledan, a 218-hectare site that will provide future business and housing for the local area on September 1, 2016 in Newquay, United Kingdom. (Photo by Chris Jackson - WPA Pool/Getty Images)

NEWQUAY, ENGLAND - SEPTEMBER 01: Catherine, Duchess of Cambridge visits Nansledan, a 218-hectare site that will provide future business and housing for the local area on September 1, 2016 in Newquay, United Kingdom. (Photo by Chris Jackson - WPA Pool/Getty Images)

NEWQUAY, ENGLAND - SEPTEMBER 01: Catherine, Duchess of Cambridge visits Nansledan, a 218-hectare site that will provide future business and housing for the local area on September 1, 2016 in Newquay, United Kingdom. (Photo by Chris Jackson - WPA Pool/Getty Images)

NEWQUAY, ENGLAND - SEPTEMBER 01: Catherine, Duchess of Cambridge visits Nansledan, a 218-hectare site that will provide future business and housing for the local area on September 1, 2016 in Newquay, United Kingdom. (Photo by Chris Jackson - WPA Pool/Getty Images)

NEWQUAY, ENGLAND - SEPTEMBER 01: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge share a joke with construction workers as they visit Nansledan, a 218-hectare site that will provide future business and housing for the local area on September 1, 2016 in Newquay, United Kingdom. (Photo by Chris Jackson - WPA Pool/Getty Images)

NEWQUAY, ENGLAND - SEPTEMBER 01: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge share a joke with construction workers as they visit Nansledan, a 218-hectare site that will provide future business and housing for the local area on September 1, 2016 in Newquay, United Kingdom. (Photo by Chris Jackson - WPA Pool/Getty Images)

NEWQUAY, ENGLAND - SEPTEMBER 01: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge share a joke with construction workers as they visit Nansledan, a 218-hectare site that will provide future business and housing for the local area on September 1, 2016 in Newquay, United Kingdom. (Photo by Chris Jackson - WPA Pool/Getty Images)

NEWQUAY, ENGLAND - SEPTEMBER 01: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge share a joke with construction workers as they visit Nansledan, a 218-hectare site that will provide future business and housing for the local area on September 1, 2016 in Newquay, United Kingdom. (Photo by Chris Jackson - WPA Pool/Getty Images)