In message , Clive
writes

I can remember the Jubilee (Fleet) line being finished in a hurry for
something or other at Stratford, so important that the moving block
signalling was abandoned. Anyone remember what it was?

The opening of the millenium dome in North Greenwich, rather than
anything at Stratford.

There were multiple delays on the Jubilee extension, including
escalating costs, lack of promised finance, and worries about the New
Austrian Tunnelling Method used.

But the full moving block signalling had to be abandoned because it was
an untried system developed by Westinghouse, and couldn't be made to
work.

--
Paul Terry