September, if you hadn't noticed, is spelled with an "r" and, according to the old rule, you can only eat oysters in months with an R in their names. The old rule is more of a myth these days - it doesn't really hold anymore. But when it comes to England's glorious native oysters, it does. They spawn during the summer and are protected, May to August, by an act of Parliament. As the weather gets cooler and cooler, the native oysters get better and better. But you can start looking for them in restaurants around the English coast right now.