In message , DW
downunder writes

Unfortunately, both the LUL A62 and ex-BR Class 313 stock are too tall
for the tunnel at Ryde St John's Road, whose tight clearances define the
structure gauge for the Island Line.

Fair enough. But would it actually be feasible to bring in 67Ts stock
or would too many modifications indeed be required? If that is the
case, I noticed that some of Victoria Line trains' current make ups
consist of 72Ts stock. Would there be enough of them for the Island
Line's requirements?

And what about the 83Ts, which used to run on the Jubilee, as an
option? Those actually might be good for the Island line, because I
believe that they required guards.

None left.

Not true - there's at least a set anna arf in Sarf Harrer sidings. Now
if they ever turn a wheel in anger again is an exercise for the reader.
--
Steve Fitzgerald has now left the building.
You will find him in London's Docklands, E16, UK
(please use the reply to address for email)