This is the site of LandSec's Park House development on Oxford Street:

As you can see it's yet to start, due in no small part to opposition by law firm Fladgate Fielder who have offices near the site. They claimed that the noise of construction would be "three years of hell", Mr Justice Collins, at the subsequent court hearing disagreed however and works should start here at the end of the year. But the site will still generate an income. How so? In early October of last year the developer was granted planning permission for the temporary use of the site for "large entertainment uses". One idea was an ice rink but the latest plan is for a Dinosaurs Unleashed Exhibition. The attraction is to have 24 full sized, animatronic dinosaurs including T-Rex, triceratops, diplodocus and stegosaurus. Punters will be able to dig for dino bones, design a dinosaur on a touch screen, run down an interactive track to leave dino footprints and put themselves in a virtual prehistoric aquarium using green-screen technology. Blimey. All this'll kick off at the end of the month, tickets around £15 a pop.
Better get down there quick! Tickets are only available to buy from January 28th to April 30th.
http://www.timeout.com/london/kids/event/170468/dinosaurs-unleashed
Even more reason to believe in Land Securities when they say it will 'plough ahead' with this development now and begin construction in May 2010 for delivery in late 2012.