"Andy" wrote in message
...
Another consideration is that there are 7 x 4 car units (plus 3 extra
cars) of 1972 Mk I stock which were converted (in the late 1980s /
early 1990s) to run in the middle of 1967 trains. These units were
split in half and each half coupled to 1967 stock half unit. This put
the 1967 stock cabs (with the ATO equipment) at the outer ends and the
1972 stock cabs (with the manual equipment) in the middle of an 8 car
train.

i.e.
from DM(67)-T(67)-T(67)-DM(67) + DM(72)-T(72)-T(72)-DM(72)
to DM(67)-T(67)-T(72)-exDM(72) + exDM(72)-T(72)-T(67)-DM(67)

A possibility is that these units will be the trains for the Island
Line, reformed back to 4 car 1972 stock trains. I believe that the
driving equipment is still used for shunting when reforming trains in
the depot.

Wasn't there also talk of sending some 1972 stock to augment the Bakerloo
line fleet?

John