Let's hope they put it in the right place, about 50% closer to Euston
Road. *And we need a station on the Circle Line, either an enlarged
and connected Euston Square, or a new one.

Again, this really isnt in any doubt - the combined WCML/HS2 station
will be extended up to the Euston Road to allow for 400m platforms on
the west side, and to make full use of the station footprint for
existing services on the east side.

Whether the existing Euston station would be rebuilt depends entirely
on whether there's a business case to do so - hard to judge without
knowing whether, and in what form, proposed lines such as Crossrail 2
and a DLR extension might take and their impact on Euston and the
other lines that serve it.

Chris