The Duke of Kent met with veteran codebreakers at Bletchley Park, decades after their secret work helped change the face of the Second World War.Prince Edward, 90, spoke with four veterans over an afternoon lunch after touring the site.The 90-year-old has served as patron of the Bletchley Park charity for 30 years, ever since he first opened the site as a visitor attraction.The duke's three-decade-long patronage of the Trust has helped preserve …