Mobile phone users who send a smiley or sad face, or any type of picture icon, in a text could be stung with massive charges – with one user billed more than £200 as a result of using these emojis.

It's been a while since the Unicode Emoji Consortium released its sixth set of proposed emojis last June, with a follow up in August (which offered up a drunken face and unhappy poo, oddly enough).