Activists outside the US Embassy in London surrounded a model of the White House to protest against the proposed US Keystone XL pipeline. Holding banners that read “Obama NO!” and “Tar sands is blood oil”, the action corresponded with 6000 people in Washington DC surrounding the White House to urge Obama to reject the proposed 1600-mile pipeline that would take tar sands oil from Alberta to the US Gulf Coast.
See http://www.no-tar-sands.org/2011/11/uk-activists-surround-miniature-white-house-as-pipeline-protests-go-global/.