The London Eye really has to be included in a trip to London. Because of the way the capsules are suspended it allows for a full 360-degree panorama when you're at the top of the wheel. Tickets can be booked online, which really is the right thing to do as it saves a lot of time. The queues look long when you arrive, but they move quickly as everyone is issued with a timed ticket. Don't forget your camera!
In 2009, the London Eye 4D Film Experience opened and is included in the London Eye ticket price. It is a fantastic 4D film to entertain you before your trip. The 4D effects are superb and this short film has the only 3D aerial footage of London.
You can also take the London Eye River Cruise Review, which is a circular route river cruise starting from next to the London Eye. A fun option is to try the London Eye Afternoon Tea Cruise too.