Love how people just assume you stick up a building, and that is that, Christ..
There will be surveys to perform, archaeological scrapes, cairns/platforms set up to load/unload materials, and what people also forget, is that they will have to work with the tide of the the Thames.
Also, the underpinning will take its time, nothing will really move until this is done, as the stand will rely on this for it's foundations.
Can't help some fans, moaned when it wasn't going ahead, moaned when it did, now moaning that it's to slow!