Progress check. The last one was in January. This is where they are up to (click for larger view):
The site is now at a very mud-slushy stage. They have finished stabilising all the edges of the site and have since been digging a series of deep rectangular holes and then filling them with reinforcement and concrete. It is a pretty random pattern no doubt related to the structure to come above. At least they have been able to use the quiet method of digging the holes and filling them rather than slamming piles down. Or perhaps that was a requirement given the immediate neighbours?