national_rail_timetable/data/specification_tables/MCA_CR.csv

1	Field	Field Description	Length	Position	Notes
2	1	Record Identity	2	1-2	With the constant value ‘CR’.
3	2	Location	8	3-10	TIPLOC + Suffix. Suffix is always the eighth character.
4	3	Train Category	2	11-12
5	4	Train Identity	4	13-16
6	5	Headcode	4	17-20
7	6	Course Indicator	1	21-21
8	7	Profit Centre Code/ Train Service Code	8	22-29
9	8	Business Sector	1	30-30
10	9	Power Type	3	31-33
11	10	Timing Load	4	34-37
12	11	Speed	3	38-40
13	12	Operating Chars	6	41-46
14	13	Train Class	1	47-47
15	14	Sleepers	1	48-48
16	15	Reservations	1	49-49
17	16	Connect Indicator	1	50-50
18	17	Catering Code	4	51-54
19	18	Service Branding	4	55-58
20	19	Traction Class	4	59-62
21	20	UIC Code	5	63-67	Only populated for trains travelling to/from Europe via the Channel Tunnel, otherwise blank.
22	21	Retail Service ID	8	68-75
23	22	Spare	5	76-80