The first Harry Potter book was published in 1997 with a hardback print run of just 500, each of which is now worth £40-50,000. Since then the seven Harry Potter books have sold nearly 500 million copies and the eight films based on these books have grossed £6.5 billion, making J K Rowling the world’s richest author with a fortune of around £600 million.

Did you know that much of modern-day London is built on reclaimed marshland? In Roman times the Thames flowed through vast wetlands—possibly five times wider than it is today. London, which began as the small Roman settlement of Londinium, expanded rapidly during the Middle Ages, driven largely by farmers reclaiming marshes, building embankments, and, in some cases, property owners pushing into the river for coveted waterfront land. Yet, amidst the sprawling urban jungle, there exists a peaceful haven—a nature reserve that offers a tranquil escape from the hustle and bustle. Welcome to the London Wetland Centre.