Initially this section did not run during early mornings, late evenings or Sundays, but a Sunday service was later added. Some journeys were then extended to Archway rather than terminating in Tufnell Park. These were then withdrawn, but were reinstated following the withdrawal of local route C12 in 1998.
Initially, this section did not run during early mornings, late evenings, or Sundays, but a Sunday service was added later. Some journeys were extended to Archway instead of ending at Tufnell Park. These extensions were then discontinued, but reinstated after the withdrawal of local route C12 in 1998.