In message , at 20:20:01 on Tue, 14
Dec 2004, Brimstone remarked:
Although it did happen in the 1980s at Ludgate Circus

Except that the "underground" line was already there.

No it wasn't. The lines went over Ludgate Hill on a bridge, and only
(some of them) went underground north of that. All the route between the
north end of Blackfriars station and the north end of City Thameslink
station is newly constructed.

http://www.pendar.pwp.blueyonder.co....rnViaduct.html
--
Roland Perry