The Sun came up with the headline "In the widdle lane" for a story about a new device that men can use when they are 'caught short' whilst driving.  The device straps on to the pertinent part, and has a tube that leads to a reusable plastic bag, can be worn all day, letting men wee wherever they need / want to. 

Widdle is a childish name for urine, and they have used it as a pun on "the middle lane", which is the centre lane of a three-lane motorway.