In article ,
Peter Masson wrote:


"Bruce" wrote


The cut and cover tunnels were constructed on an ad hoc basis to allow
buildings to be constructed above, in a way comparable to the Gerrards
Cross Tesco project.

Most of the original Met (Paddington to Farringdon) was built under streets,
which were reinstated after construction of the railway. The District,
between Westminster and Blackfriars, was built as part of the Victoria
Embankment project which also incorporated the river wall, the road, and
Bazalgette's sewer.
http://www.historytoday.com/roger-hudson/taming-thames

Indeed, even the bored tubes were mostly constructed under streets, as the
need for underground wayleaves and the risk of even the slightest damage
to property made it impossible to get Acts through parliament otherwise.

I CBA to go through "Lost Tube Schemes" in fact I can't even find it
right now (it's lost ). But until the Metroland project came along
there were few if any underground railway proposals for areas that were
not already built up - why would there be, there'd be no traffic for them!

Nick
--
"The Internet, a sort of ersatz counterfeit of real life"
-- Janet Street-Porter, BBC2, 19th March 1996