Extensive travels last week so I will tier them:
Very good: GWR 166, Avanti 390, TL 700, WMT 730, LNWR 730, WMT 196
Average: XC 170, XC 221, GN 387, SE 465
Awful: SWR 159, Avanti 390 (standing in vestibule), Victoria Line
Hazardous to human health: TfW 158
The 387 had been switched off during...