They say that all roads lead to Rome. That may be so, but I know one thing for sure: all bus routes end in Crystal Palace, a south London suburb on a hill. I know this partly because I live there and partly because of the crowds of dazed bus passengers wandering around near the bus station, tipped out unexpectedly at the terminus, some miles short of their homes. But it does mean I get a choice of buses where I live, and two in particular go nearly past my house. I tend to catch whichever one comes fi rst, but there’s a big difference between them.