(10 Mar 2026, 3:27 pm)Malarkey wrote Several that I thought of straight off the top of my head. 

Red Arrows X1/X2/X3 (Every 10 Minutes) - Now just the X1 (Every 15 Minutes)
Silver Arrows 2A/2C (Every 10 Minutes) - Now just the 2 at (Every 20 Minutes)
Metrolink M1/Connections 4 (Every 10 Minutes) - Now as the 4 (Every 15 Minutes)
Metrolink M2/M3 (Every 15 Minutes) - Now operates Hourly between The Galleries and Waterview Park as the 82 which has had many subsidised incarnations over the years under various operators including GCT, GNE and Arriva Durham
Prince Bishops 20 (Every 10 Minutes) - Now 20/20A (Every 15 Minutes)
Crusader 27 (Every 10 Minutes - Now (Every 15 Minutes)
Saltwell Park/Voltra 53/54 (Every 10 Minutes) - Dropped to (Every 12 Minutes) and then down to current frequency of (Every 15 Minutes)
FAB56/CityRider (Every 10 Minutes) - Recall this dropping to (Every 15 Minutes) before increasing to (Every 12 Minutes)
Citylink 58 (Every 10 Minutes) - Now (Every 15 Minutes)
Loop 93/94 (Every 15 Minutes) in each direction - Now (Every 20 Minutes)
Quaycity Q3 (Every 15 Minutes) - Now (Every 20 Minutes)