The original london sightseeing tour get even bigger savings with our 48 hour ticketupgrade your original tour ticket and get a second day for only an extra 10 per adult and4 per child includes 48hr ticket free river cruise upgrade to greenwich three freewalking tours experience the best of london aboard the original tours famous red open top buses londons most popular sightseeing tour offers its guests the ultimate introduction to the capital entertaining live guides 11 for