Considering Jack Rolfe has supposed to have spent all his life building boats in Tarrant on the south coast, he has a surprisingly strong northern accent.
Whilst the very rich characters in chauffeur driven cars appear without wearing seatbelts this was permitted in the United Kingdom when the series was filmed as the requirement to wear seatbelts in the back seats of cars did not come in until the The Motor Vehicles (Wearing of Seat Belts in Rear Seats by Adults) Regulations 1991.