"John Rowland" wrote in message
...


And the route might even still be safeguarded. A certain
amount of reusable infrastructure exists along the route,
such as holes through the foundations of the office block at Cannon Street
station,

..... (which I now realise the algnment could not possibly reach )...

and nearly-large-enough tunnels from Aldwych to Charing Cross,
lift shaft at Aldwych, escalator shaft with escalators at Charing
Cross. The WWII bomb site at Blackfriars, which was kept
for Fleet/Jubilee construction access, was built on in the last few years.