A new webcam mounted on the Blue Fin Building at Bankside allows local residents to get a glimpse behind the hoardings as preparatory works for Tate Modern's extension get under way.
The webcam captures an image of the building site to the south west of the existing Tate Modern gallery every 15 minutes during the working day. The images can be viewed as a time-lapse sequence to give an indication of progress on the site.
In January Mayor of London Boris Johnson visited Bankside to start enabling works for the gallery's extension.
The Mayor wielded a shovel at a symbolic ground-breaking ceremony in one of the three oil tanks of the former Bankside Power Station.
The oil tanks will form a key feature of the expanded gallery designed by Herzog and de Meuron which Tate hopes will be completed in 2012.
This week Tate unveiled a new open-air exhibition on the hoardings around the building site by Swedish artist Martin Karlsson.
Tate still has a long way to go to raise all the funding required for the £215 million extension.
• Follow the progress at www.lobstervision.tv/transformingtate