This 'acquired taste' style ale is worth trying. It's probably the hoppiest ale I've ever tasted. Named after JR Mitchell's famous Spitfire aeroplane as it was used in World War 2 during the Battle of Britain. It plays out a pun, calling itself The Bottle of Britain.
While it says, "Since 1698," this ale wasn't brewed until 1990. I would guess the Shepherd Neame brewing started in 1698 and if this is important to you, please feel free to find out and let me know.