CrossCountry (XC) power cars:
43207
43285
43301
43303
43304
43321
43357
43366
43378
43384
XC Class 170 DMUs:-
170101
170102
170103
170104
170105
170106
170107
170108
170109
170110
170111
170112
170113
170114
170115
170116
170117
170397
170398
170518
170519
170520
170521
170522
170523
170636
170637
170638
170639
XC Voyagers::-
220001-220034
XC SuperVoyagers:-
221119-221141
The class 43s (HSTs) are locomotives and usually work with a 43 leading, 7 coaches (mk3s) and then another 43 on the back.
The class 170s are formed of both 2 and 3 coaches and work around Birmingham. 170101-170110 are 3 coach, 170111-170117 are 2 coach, 170397 and 170398 are 3 coaches, 170518-170523 are 2 coaches and then 170636-170639 are 3 coaches.
The class 220s are all formed of 4 coaches and in my opinion are the worst train on the network (along with 221s which are formed of 5 coaches except 221141 which is formed of 4).
I hope this helps.