So based on my are you a real Londoner theme, you need to visit the London Eye. How can you not love a giant tourist attraction that looks like a ferris wheel? Not only can you enjoy the beautiful sights of London, but it makes for a great day out on the Southbank. Its really easy to book tickets and if the weather is rubbish be assured that you can remain dry inside one of the cubicles.
Check out the site and get going!