Update - 11/03/2010
A further update, and one week on work continues apace.
The conversion of the sea lion enclosure is coming along quite rapidly. A lot of the structure has now been spray coated with a concrete mixture and the new retaining walls have blended into the existing perimeter.
A large tree now lies across the division between the two pools. It must have been fun getting it there (wouldn't have minded seeing that). Later I noticed that a similarly large tree had been felled on the north side of the Silver Jubilee garden. It seems logical to assume it's the same tree.
On the north westerly side of the enclosure, where the workmen can be seen in this shot, the boundary of the enclosure is being pushed out into the path. Large holes were being made and new wooden uprights put into position. There is also some wire fencing, approximately six feet in hight, set back from the new perimeter. Apologies for not getting a better view of that, it's a bit cheeky to photograph people at work when you're standing right by them.
Back by the Oakfield, there's now a path with a ninety degree angle roughly where the old through-route used to be at the north end of the old coati/otter enclosure. It looks like it'll join the pathway adjacent to the Rare Parrot Breeding Centre, with the back of the Roman Garden. As yet, there is no sign of any new enclosures in this area to replace the demolished aviaries.