Producers behind hit period drama Downton Abbey have reportedly banned modern luxuries from the set after a plastic water bottle ruined a promotional picture.

Last week (beg11Aug14), Tv bosses released a photograph featuring Hugh Bonneville and Laura Carmichael in character to plug the new season, but the snap hit headlines for all the wrong reasons when fans spotted a mineral water container perched on a fireplace.

Producers have now issued strict orders to the cast and crew to keep modern items away from the set, banning accessories such watches and jewellery.

A unnamed castmember tells Britain's Daily Telegraph newspaper, "Modern watches and jewellery are out and so even is modern underwear as the danger is apparently too great it could be seen if we bend over. They have relented in the case of prescription glasses and asthma guns, but that's about it."

The Downton Abbey cast hit back in the aftermath of the publicity crisis by posing for a humorous snap holding plastic bottles to promote the charity WaterAid."