les sources
http://i.telegraph.co.uk/multimedia/archive/02128/Tower_Bridge_night_2128191a.jpg
http://upload.wikimedia.org/wikipedia/commons/2/2b/London_Eye_4.jpg
http://pixabay.com/static/uploads/photo/2014/02/02/13/22/telephone-booths-256713_640.jpg
https://farm7.staticflickr.com/6165/6200854453_4474e90482_o.jpg
http://upload.wikimedia.org/wikipedia/commons/8/82/London_Big_Ben_Phone_box.jpg
http://upload.wikimedia.org/wikipedia/commons/7/74/Londres_-_Big_Ben_de_nit.JPG
http://pixabay.com/static/uploads/photo/2013/12/03/17/21/london-223143_640.jpg
http://pixabay.com/static/uploads/photo/2014/03/18/13/10/london-289986_640.jpg
http://pixabay.com/static/uploads/photo/2014/09/11/18/23/london-441853_640.jpg
http://upload.wikimedia.org/wikipedia/commons/f/f6/City_of_London_skyline_from_London_City_Hall_-_Oct_2008.jpg
http://upload.wikimedia.org/wikipedia/commons/3/37/Bearskin.cenotaph.london.arp.jpg
http://upload.wikimedia.org/wikipedia/commons/1/1a/Life_guards_-_Whitehall_(London).JPG
http://pixabay.com/static/uploads/photo/2013/06/08/23/25/flag-123562_640.jpg
http://upload.wikimedia.org/wikipedia/commons/6/6e/London_Thames_Sunset_panorama_-_Feb_2008.jpg
http://pixabay.com/static/uploads/photo/2013/07/18/20/25/big-ben-164936_640.jpg
http://s0.geograph.org.uk/geophotos/01/49/99/1499962_7f6e1f9b.jpg