Managed to catch one yesterday, from Stratford International to Canning Town. Took some photos:
15862 by Geogregor*, on Flickr
15864 by Geogregor*, on Flickr
15865 by Geogregor*, on Flickr
15866 by Geogregor*, on Flickr
15867 by Geogregor*, on Flickr
15868 by Geogregor*, on Flickr...