Prince Charles Duchy of Cornwall 70th anniversary speech part 1

The speaker expresses gratitude for the audience's resilience in the heat and reflects on memorable visits to Cornwall, including the Royal Cornwall Show. They humorously recount a miscommunication with a past chairman and discuss the evolution of Duchi Farms over generations, highlighting the transition from grandfathers to grandsons and granddaughters.

Who was the chairman mentioned in the speech?

What has the speaker observed about Duchi Farms over the years?