The demonstration was speaking out against the ongoing destruction, exploitation and repression by Shell and other oil companies in the Niger delta and all over the world. The execution nooses were hung from the lampstands that illuminate the Shell Centre at night. Banners were unfurled, leaflets handed out and one activist spoke through a megaphone to explain to the public - and to Shell employees - the reason for the macabre installation above their heads. Police arrived and asked activists if they had applied for written permission to demonstrate, as the area was within the new Parliamentary half-mile no-protest exclusion zone.
Your correspondant left as the anti-demonstration was making its way round the building to the other entrance, apparently over half a mile outside the exclusion zone...