Project a few years ago to change the National Gallery. This story is from 2002. I don't know what has been done to the building since this time. The new steps seem to be the most obvious change.:

http://www.hughpearman.com/articles4/natgall.html

http://www.hughpearman.com/illustrat...lgraphic1a.jpg

The British Museum. The old roof!! :-)
Bomb damage.

http://i4.photobucket.com/albums/y12...tback/WZ03.jpg

http://i4.photobucket.com/albums/y12...tback/WZ02.jpg




It looks like they kept the old exterior structures. They added a roof over the courtyard, put in stairs to the tower and pulled down some structures:

http://go2.wordpress.com/?id=725X134...7%2F775561.jpg

British Museum. More pictures of the old roof:

During construction:

http://i4.photobucket.com/albums/y12...tback/WZ04.jpg

Complete:

http://i4.photobucket.com/albums/y12...tback/WZ05.jpg

http://i4.photobucket.com/albums/y12...tback/WZ01.jpg

British Museum..Windows from inner courtyard 1930's:

http://i4.photobucket.com/albums/y12...tback/WZ07.jpg

Part of the rear of the Museum:

http://i4.photobucket.com/albums/y12...202/WBM07b.jpg

National Gallery:

http://farm4.static.flickr.com/3099/...3ff7d5ca_b.jpg

http://i4.photobucket.com/albums/y12...back/WNG03.jpg

http://i4.photobucket.com/albums/y12...back/WNG06.jpg

The back of the British Museum:

http://www.yourlocalweb.co.uk/images...eum-166760.jpg

I couldn't find the thread with the request for Tower Bridge information/photos, so I'll post this here:

1930's :

http://www.oldukphotos.com/graphics/...201930%27s.jpg


Very large picture of the bridge:

http://www.histografica.com/pictures...o_4etys4lw.jpg

Roof of National Gallery (I'm unsure if it is that):

http://i4.photobucket.com/albums/y12...back/WNG07.jpg


BIG PICTURES - The following are from this excellent site with lots of VERY LARGE pictures. You can use the map function to show photos from all England (and other counties too)!!!!! All of these hand coloured photos are from year 1890-1900:

http://www.histografica.com/search.a...to=2000&page=1

or

http://images.google.se/imgres?imgur...CJCl-AaErtn2AQ

Very big picture, Trafalgar Square and the National gallery:

http://www.histografica.com/pictures...o_6fovt51x.jpg






Another big picture from Trafalgar Square:

http://www.histografica.com/pictures...l_qq1kjq07.jpg

Extremely large version:

http://www.histografica.com/pictures...o_qq1kjq07.jpg

Picadilly Circus:

http://www.histografica.com/pictures...l_jbjh16dz.jpg

Extremely larger version:

http://www.histografica.com/pictures...o_jbjh16dz.jpg




Horse guards Whitehall:

http://www.histografica.com/pictures...l_tiabvg95.jpg

Extremely large version:

http://www.histografica.com/pictures...o_tiabvg95.jpg



http://www.histografica.com/pictures...l_u9jqgrmi.jpg

Extremely large version:

http://www.histografica.com/pictures...o_u9jqgrmi.jpg

http://www.histografica.com/pictures.../l_073gzuc.jpg

NOTE: Extremely large version of this photograph!!:

http://www.histografica.com/pictures.../o_073gzuc.jpg


http://www.histografica.com/pictures...l_x1eaoo7n.jpg

Extremely large version:

http://www.histografica.com/pictures...o_x1eaoo7n.jpg

Etremely large Dover pictures:

http://www.histografica.com/pictures...l_gp3qwzg1.jpg

Extremely large version:

http://www.histografica.com/pictures...o_gp3qwzg1.jpg


http://www.histografica.com/pictures.../l_sf0pujc.jpg

Extremely large version:

http://www.histografica.com/pictures.../o_sf0pujc.jpg


http://www.histografica.com/pictures...l_qvilacua.jpg

Extremely large:

http://www.histografica.com/pictures...o_qvilacua.jpg


http://www.histografica.com/pictures...l_6wig9dv8.jpg

Extremely large:

http://www.histografica.com/pictures...o_6wig9dv8.jpg

Thanks for your research Major!