Clive Page wrote:

As others have pointed out in this thread, you can still use the
original routes to reach King's Cross, and of course St.Pancras.


Can you? I can't even find them or any signs pointing to them, never
mind actually using them. (In fact, I'm pretty sure the old passages
to St Pancras, and the old escalator into the heart of the old Kings
Cross concourse are all long gone.)