We didn’t shoot it practically because we just couldn’t find a location good enough. We have another office in the film but it is very normal/mediocre. We wanted the window to be absolutely huge (a wall that is a sheet of glass) and it had to have a decent view of London. We also wanted control over the weather elements and so on. To do all of this practically would have been very expensive for us. Plus it gave us the chance to experiment with green screen and learn a bit more about working with Visual FX.
Darrell 
What res are they at now?
