A PROMOTIONAL picture for the new series of Downton Abbey has caused an online sensation after a fan noticed a plastic bottle of water behind Hugh Bonneville and Laura Carmichael.

As the images were released, Bonneville and Carmichael, who play the Earl of Grantham and Lady Edith, were upstaged.

One fan, Diana Pearl, offered a solution, tweeting: "Obviously the Crawley family invented the water bottle. That's how they were able to support the estate."