The Question Mark Inside is a multiple installation projection artwork by Martin Firrell, based on and around St Paul's Cathedral. This is a grubby cameraphone videoclip of the installation on the west front of the cathedral at night:
(I agree, I really have to upgrade my cameraphone.) The slogans that appear in the centre of the picture are adapted from ideas sent to Firrell's blog specially set up to harvest opinion and thoughts directed towards this exhibit. If you want to get a sense of the scale and size of the west front of St Paul's Cathedral you might want to have a look at the opening of this rudimentary but entertaining music video I created a couple of years ago which incorporates the building at the beginning.