"Clive D. W. Feather" wrote in message ...

I believe the actual problem is that A stock is significantly wider at a
different vertical location. Loading gauges aren't just an overall
height limit and a width; they're a complete shape that the train has to
fit into.

I guess that begs the question of why A stock was given a profile that they knew
would not fit in some of the sub surface tunnels. After all , the underground was
well and truly integrated in the 60s so it wasn't because the met line was still
a seperate competing railway, and London Transport had no way of knowing where
the trains might be needed in 20 or 30 years. Seems a strange design decision to
make to me.

B2003