On Oct 31, 6:04*pm, Nick wrote:
On Oct 31, 12:16*pm, "Peter Masson" wrote:

"Nick Leverton" wrote

I don't remember there being any restriction on that in control terms..
Up to about 1969/70, MLV+MLV+Cep+Bep+Cep was common on boat trains -
effectively five units. *I think I recall workings later on such as
8Hap - four units. *My early notebooks unfortunately didn't include
train formations.

I've got a note that I travelled on a 5 unit train, 0910 Charing Cross to
Folkestone, in 1971 orv 1972, 5x2HAP from Charing Cross, rear 4 detached at
Tonbridge. I also have a note of a 4-unit train in 1971, 0940 Victoria to
Ramsgate formed 2HAP, 2HAP, 4BEP, 4CEP, rear 4 detached at Faversham for
Dover.

Peter

ISTR a 6x2HAP in the 1983/84 timetable which was an evening rush hour
train from Waterloo to Basingstoke/Alton, splitting at Woking, half
going to each destination.

Nick

Looking at my 1984 copy of "Southern Region Multiple Unit Trains",
published by the SEG, all EMUs were allocated a Traction Motor Index,
usually equivalent to the number of traction motors in a unit, and the
maximum TMI allowed was 16. So a 16-car formation of any units apart
from 4REPs would have been permissible. TMIs that did not correspond
to the number of vehicles or for locos etc were (as quoted in the
book):

4REP 14
Class 73 8
GLV 2
MLV 2 (this is not quoted but is my belief).