Just noticed this link on the BBC website to a new exhibition opening in London tomorrow. If the material is all as good as the examples shown here, it should be well worth a look.
http://www.bbc.co.uk/news/uk-12464386
As usual, I couldn't work out how to start a new thread (any chance of a button at the top of the page for 'start new thread'?) so tacked it on the end of this one in the hope that those who are into such things will find it!
Cheers,
Steve