CBS Outdoor UK has launched a new bus advertising medium with clothing retailer Gap announced as the launch sponsor. The campaign makes use of illuminated T-sides on London buses, which will travel around the city's busy Gold routes over the next four weeks.

"We're excited about this campaign and it's the first time the bus format has been used in this way," says Jason Cotterrell, UK country director at CBS Outdoor UK. "It's a great example of the versatility and flexibility of the bus format and how it can be used to really communicate a brand message."

The new lit bus T-sides will be used to promote Gap in London's main shopping areas

The Gap campaign, called 'Be Bright', was developed by PHD and booked by Posterscope. PHD's media manager Dee Levison adds: "PHD has a long heritage of media innovation and we're delighted to make Gap the first brand to use the illuminated T-side format. It is the perfect medium for Gap to communicate its 'Be Bright' message to a targeted shopping audience, particularly with the dark evenings throughout February."

Ten T-sides will be illuminated, accompanied by 140 non-lit T-sides.