ARRIVA
6 Durham - Cockfield: dropped from every 12 mins to West Auckland (continuing to Cockfield twice an hour) > every 15 minutes to West Auckland (half hourly Cockfield) > every 20 minutes for full route [last change, October 31 2021]
7 Durham - Darlington: dropped from 15 minute frequency to 20 minute frequency [October 31 2021]
43 Durham - Esh Winning: dropped from 15 minute frequency to 20 minute frequency [November 29 2020]
49/49A Durham - Brandon Circular: dropped from a combined frequency of every 10 minutes to a combined 15 minute frequency
64 Durham: cut to 15 min combined frequency (half hourly each route), currently full route on a 20 minute frequency [October 31 2021]
X26/X27: previously combined 20 min frequency (2 × X26 - 1 × X27), now combined half hourly
SCARLET BAND
20 Neasham - Bishopton: suspended at start of lockdown but never returned, now withdrawn
35A Bishop Auckland - Ferryhill: dropped from hourly to 2-hourly (evening service) [August 3 2020]
57X Hutton Henry - Durham: withdrawn [June 21 2021] (this was one journey on weekday mornings in this direction only)
108/109 Bishop Auckland - Willington/Oakenshaw: dropped from combined 30 minute frequency on weekdays to an hourly service to Bishop Auckland, seemingly combined 2-hourly (conflicting and confusing timetables are confusing me however) [January 13 2021]
113 Sedgefield - Ferryhill - Bishop Auckland: cut to only run Sedgefield to Ferryhill [July 12 2021]
PR1/PR2: cut from every 10 minutes to a 15 minute frequency [January 13 2021]
S1 Mount Oswald - Gilesgate: withdrawn, replaced by service 42 [October 4 2021]
WEARDALE
X6/X6a Stanhope to Newcastle/MetroCentre: currently suspended [December 18 2021]
SERVICE 239: as already mentioned the GNE ran 239 is now only running between Peterlee Bus Station and Station Town, however a separate 239 now runs from Wingate to Sedgefield operated by John Crake. [November 1 2021]
List of bus service cuts following Covid-19