(04 Jan 2022, 3:56 pm)ASX_Terranova wrote Extending the 21 to langley park would mean you could withdraw the 25
Then you have the problem(s) of the 21 doubling back on itself at Durham (Langley Park is North West of Durham); the 21 more or less duplicating the X20; and passengers using the service from Langley Park having to do endure a lengthy tour of Durham with an added journey time of probably 30 minutes or more.