D eep in a medieval hunting forest, amid 6,500 acres of heathland, a wooden bridge spans a tributary of the River Medway. Every single day, no matter the weather, people flock to stand on its slats and cheer on sticks as they float downstream. I know this because on a frosty but sunny morning, (“a very long time ago now, about last Friday”, as children’s author AA Milne might have said), I stood with two such adults jumping up and down with delight as my little piece of oak stormed ahead and won the race. The game is Pooh Sticks, originally described by Milne in Winnie-the-Pooh, which was published in 1926. It was inspired by the game he and his son, Christopher (Robin), would play on Posingford Bridge in Ashdown Forest (AKA the Hundred Acre Wood) in East Sussex. Just 30 miles south of London, this sprawling open heathland lies within the High Weald Area of Outstanding Natural Beauty.…