I apologise for the somewhat lengthy title, I tried to keep it clear as possible without being too long. But I've noticed that the Liverpool to Newcastle services on TransPennine Express seem to wait at Manchester Victoria for about 10-15 minutes. Why is this the case? Having travelled on the journey a few times it can be somewhat frustrating, especially when I'm on the return journey, and having a journey padded out to over 3 hours because of the long stop just feels like forever when you're anxious to get home. However, I assume there's a good reason for this, either through pathing, passenger flow, or maybe to change over to bi-mode power and vice versa, but I don't quite know what it could be. So my question is, why do TPE services between Liverpool and Newcastle make such long stops at Manchester Victoria. Are there any specific reasons for this?