London Assembly member Val Shawcross recently tabled this question to Mayor of London Boris Johnson:
I understand that the C10 has a problem due to traffic in the Rotherhithe area and are working with the operator to resolve it. Can you provide details of what the problem is and what is being done to resolve it?
Boris Johnson replied:
Approximately 6 per cent of trips did not serve the Rotherhithe peninsula in the 12 weeks from 24 May to 15 August 2014 as a result of congestion along Jamaica Road and the Rotherhithe Tunnel area.
To address this, and overall reliability issues, the operator of route C10 (Abellio) and TfL are planning a more robust schedule that is expected to be introduced by the end of the year.
In the meantime, TfL has stressed the importance to the operator of managing the route effectively.