100 Elephant and Castle to Shadwell. It seems surprising to find these small single-deckers passing through the City of London. The reason for the small buses is the narrow cobbled streets traversed in the mysterious area of Wapping which this route penetrates. The warehouses may contain yuppies rather than tobacco or spices nowadays, and they don't put pirates bodies in gibbets at Wapping old stairs any more, but it's still impressive.  Frequent service.

For timetable see http://www.londonbusroutes.net/times/100.htm