"Paul Terry" wrote in message
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In message
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lonelytraveller writes

The post office railway is disused.

Why didn't they just widen the tunnels and reuse them for Crossrail,
instead of digging hugely expensive new ones?

It's not deep enough - the Post Office Railway is on average 21m below the
surface, although the stations are virtually at basement level (and so the
tunnels also have steep 20% gradients either side of stations). Crossrail
in the central area is up to 36m below the surface. Also, the Post Office
Railway doesn't have a straight enough alignment - it runs north of Oxford
Street, curving up to Wimpole Street and then coming back south before the
big loop up to Mount Pleasant.

It is a shame, though, that it hasn't been put to some good use since its
closure.

Like turning it into a museum perhaps

tim