Peter Masson wrote:
"Graeme Wall" wrote
And, of course, there's the District/Piccadilly line between Ealing and
Hammersmith

One that hasn't been mentioned is the DLR between Tower Gateway and
Crossharbour - partly on the 1840 brick viaduct of the Blackwall Railway and
partly on concrete viaducts 150 years newer. In its time it has seen rope,
steam, and electric traction, and part of it is, at least more or less, on
the alignment of a section of the Millwall Railway which was once
horse-worked.

Peter


The last section of the Met to Watford is on a bridge over Croxley Moor.

--
Corporate society looks after everything. All it asks of anyone, all it
has ever asked of anyone, is that they do not interfere with management
decisions. -From “Rollerball”