Dave Arquati wrote in
:

SNIP
A central London monorail system was proposed in the 1960s but soon
abandoned. A key sticking point was the station infrastructure. A
monorail may look slimline, but an elevated station certainly does not
- you need platforms, stairs and lifts. The station shown on Euston
Road in the video already makes the street look very enclosed -
imagine what it would look like on a narrower typical street such as
Regent St or Oxford Street. People already complain about the
intrusiveness of tram overhead power lines - imagine the reaction to a
two-track monorail down Oxford Street!
SNIP


I know the video has other parts of London such as Euston Road and various
bridges with a MonoMetro, but as far as I know, the plan is just for a
connection between Liverpool Street, Isle of Dogs and Stratford City, isn't
it? So it shouldn't be too intrusive.