In article , Tom
Anderson writes
Camden Town's not cross-platform?
Is it? I thought it has two close, but separate "sub-stations"?

Not exactly. There are separate bits for the Barnet and Edgware
branches,

It's also worth noting that these form a \/-shape; they are much closer
together at the south end than the north end (since both follow the
roads above).

but the southbound platforms for both are sunk below the northbound
platforms, and there are level passageways connecting each directional
pair. Hang on, i'll have a crack at some ascii art:

Actually only the northbound connection is level - the southbound
passageways involves stairs to connect to them. There's also much more
vertical overlap than you show. Making an attempt to edit your artwork:

_____ _____
/ \______________________________/ \
| NB Ew ____________ ____ ______ NB HB |
\_____/ _/ _| |_ \_ \_____/
_____ _/ _| |_ \_ _____
/ \__/ _| |_ \_____/ \
| SB Ew ____| |_______ SB HB |
\_____/ \_____/

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