Also worth pointing out that different links at Euston go to different places. From what I remember, the voyager links don't sign Liverpool but are the ones who sign chester. Also there was a link that signed 90s and DVTs but I guess that's moot now.
The other depots available are wolves and Manchester.
wolves sign Preston - Euston direct plus west midlands and all the diversions there you'd expect. Some, if not all, now sign wolves to Shrewsbury as well. They also sign Barton under needwood depot and the line too/from there. Traction is 221 and 390.
Bottom link at Manchester is pretty much Manchester to London only, via crewe or Macclesfield, plus the west midlands. Traction is 390 only. Higher links add Preston and Holyhead, and 221s.