"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