Changes to the X1 and X11 from Saturday/Monday. X1 revised to every 15 minutes, Dalton Park link binned - Peterlee every 30 mins. X11 withdrawn after Sunday’s operation. 

https://www.gonortheast.co.uk/changes-x-...asider-x11

A good move in my opinion, operating special seaside trips when normal services are cancelled left, right and centre isn’t great for those who rely on buses just to get home at night. And the X1 every 15 minutes makes sense as at least it’s now exactly every 30 minutes to Peterlee.