The London Transport Museum said "A great time was had by all as the teams raced against the clock to solve the cryptic clues and recreate images from the Museum's photograph collection. Images from the day were creative, inspired and just down right cool. You can check them all out through the Museum's brand spanking new online Roundel exhibition or from our Flickr page."
You can now vote here for your favourite team photographs. The winning team will receive a roundel-themed prize and be featured on the Museum website.