London Bus Updates on Twitter: "Routes reverting to front-door boarding are: 1, 4, 6, 7, 16, 17, 29, 30, 31, 32, 33, 34, 35, 40, 41, 43, 46, 50, 52, 63, 72, 78, 81, 83, 88, 90, 91, 92, 95, 98, 102, 106, 107, 110, 112, 113, 114, 117, 120, 123, 125, 133 ...