BT snaps London in world's biggest ever panorama image

Smile London, you're on camera. BT has taken 42,640 photos of the capital and stitched it all together into the world's largest panorama photo.

The 320 gigapixel image is so large it took a computer three months to process it and if it were printed out at the same resolution as a normal photograph it would be as big as Buckingham Palace.

Taken from the 29th floor of the iconic BT Tower it took professional photographers three days to capture all the images needed. Four cameras were used to capture the image which can be zoomed in on to view up to 20 miles into the distance. As seen in the image above, there are one or two errors in the image.

The previous world record for a supersized panorama photo was an 80 gigapixel image taken from the nearby Centre Point tower at the end of London's Oxford Street.

Suzi Williams, director of marketing at BT said the image was taken to mark a year of celebrations in London.

"The BT Tower is such an iconic London landmark, and became a focus for the capital's celebrations in 2012, what better way to capture that remarkable year than with a full panoramic photograph taken from its roof."

People are being encouraged to look around the image and find Buzby, BT's former mascot. The cartoon bird was featured in BT adverts during the 1970s and has been hidden somewhere in the huge panorama.

Anyone who finds Buzby is in with a chance of winning free broadband, an iPad and a trip to the top of the BT Tower.