The current 4 artics cause serious congestion problems in the evening peak around the city hall - they had to make room for them by giving Cityexpress its own stop. What would it be like with 20 (or more of them)? How do you accommodate them in the depots? NB has plenty of room, but SS doesn't. The deckers are now appearing on other routes - 2930 (I think) was on the 34 at lunchtime today and the 63 around 4:00 - it therefore probably ran all day on the 33-34-35-63 routes.