The King and Queen are to meet Britons running businesses in south-western France before touring a vineyard on the final day of their state visit.
Charles and Camilla will fly from Paris to Bordeaux, a change from their original plans amid French media leaks, before being welcomed in a town hall.
They will join a reception on a Royal Navy frigate and ride a tram to the main square to meet British and French business owners on Friday.
Charles is to hear about the effects of climate change on forest fires, while Camilla will meet a local charity supporting disadvantaged people.
The couple’s visit will end with a tour of a sustainable vineyard.
Bordeaux, famous for its wine, is home to around 39,000 Britons and is twinned with Bristol.
The King said in his historic address to the French Parliament on Thursday the “shared link” between the two cities is just one of a “countless number of connections” between the UK and France.
