Aquí un enlace a un completo análisis de la obra por parte del arquitecto Jaume Prat y más información aquí y aquí (Pincha sobre las imágenes para una mayor resolución).
Todas las fotografías son mías excepto la planta baja, que es de www.bdonline.co.uk
Back again with a photographic monograph from London, by the hand of the Smithson (Peter and Alison either Alison and Peter, as you prefer). Clear urban intervention a bit of a cunning one, a perfect harmony between what arquitecture and urbanism should be, right in the middle of Central London, just a couple of streets far away from St James' Park and few minutes walking from Picadilly Circus. It worths totally a visit, not only for its constructive sophistication, rather for its natural way to show itself to pavement walkers, in spite of the artful play mentioned a moment ago, handing over a formerly private space to a free pedestrian use. Without any doubt, quite a reference work of these British architects.
Here (only in Spanish) you can find a whole analysis of this architecture piece thanks to the architect Jaume Prat and more info here and here (Click on the images for a higher resolution)
All the pictures shown here are mine but the Site plan, taken from www.bdonline.co.uk