(01 Mar 2017, 4:24 pm)R852 PRG wrote It isn't used as a canteen, it is often used as a means of shelter during the rain when drivers are waiting to go onto their next bus, as opposed to the bench immediately in front of the building. The canteen is located behind the travel shop.
But you can get through to the canteen via the old travel shop - there's a door behind the desk. Many drivers use this as through access to the canteen upstairs, and will come back out via the side door.