According to a member of SkyscraperCity, the handover of the Northern
Ticket Hall site at King's Cross St Pancras (presumably just at ground
level) had taken place recently. This is a critical stage because
construction of the Western Concourse may now commence if it hasn't
already. [http://tinyurl.com/669lov]

Some recent pictures of the site (about 2 weeks ago, 2 days before
handover back then) have also been published by said member (no pun
intended!):
http://tinyurl.com/5ffm62
http://tinyurl.com/5s9ovx
http://tinyurl.com/624t8g