"S R" wrote in message ...
I can't see any reason why they'd diagram in such a way to be 376 only,
but it could be done in theory, which is why I assume the OP
asked the question.

My reason for asking was concern that routes limited by platform length to
8-car trains would see all their peak-period 6- and 8-car trains replaced by
5-car trains.

S R

I wouldn't be at all surprised. History shows a reduction in length
when new stock is introduced.

I guess we can take it that the introduction of five-car units is a
confirmation that we will never see the twelve-car trains for which
all those platforms were extended.

Maybe there has been an improvement in availability, but only in the
last couple of years has the peak-hour train length finally started to
increase (to a maximum of ten), after the general reduction in length
when the "Networkers" were introduced.

It was galling to have to stand in shorter trains when they were
introduced, having gone through all that disruption to extend the
platforms for the "longer Networker trains".

Soon after, some twelve-car slam-door trains on Ramsgate/Margate
services to Cannon Street were replaced by eight-car 365s. Did the
365s ever run in longer formations than that? I can't remember seeing
one.