Wednesday 3 May 2017 8.32am
I think they may need a lot of space for new tunnels etc. The most obvious place to me is right behind the current Bakerloo line station as they are pulling all that down behind to build huge skyscraper things with gardens on top which is of course why they won't use that space. They are going to need more space than the pocket park for sure. I think Perronet Hoyse was built by some famous architect so they probably won't demolish that. Things are not looking great!
Judging by the works for Crossrail, I think the problem is not so much space to build a new station but the huge works- and access-sites they will need. For example, they'll need space for a vertical access shaft to lower those massive tunneling machines down. And they don't seem to be averse to demolishing perfectly good buildings to give them the space they need.
In theory, this would only be until construction is complete - but they do tend to hang on to space for permanent access and ventilation shafts.