Cycle campaigning

This is why the bus lane are suggested as they often take less hammering than the other lane, I'm not aware of any massive potholes on CS7 currently, the only section I didn't commute further on is beyond Elephant and Castle.

Seems unlikely. Road wear is proportional to the fourth power of the axle weight. Buses are heavy, constantly stopping and starting and pulling into the kerb so they're likely to wear the carriageway pretty severely.