The billboard has long been one of the most powerful forms of location advertising. Just think of New York’s Time Square – many a car accident has been caused be motorists loosing concentration because their attention has been captivated by a ten storey high image of Madonna, Kate Moss or Calvin Klein’s latest model.

If it hasn’t already caused any accidents we’re predicting that this sexy new billboard ad in London for underwear brand Pretty Polly will have cars thumping into each other in no time. The six storey ad features a leggy model wearing a skirt made from real material which, when sent north by the wind reveals her sexy black tights. We love it.