The following story from BBC Radio 4 may be of interest to international colleagues:http://news.bbc.co.uk/today/hi/today/newsid_8161000/8161223.stmNote the existence of a permit system, and the involvement of (and donation of objects to) the Museum of London - this isn't an analogue to the NY Times story about bottle collecting in Manhattan privies.Buttons enthusiasts may be particularly interested in what has now turned into a potentially exciting new research resource.I make no comment about the French porcelain pornography.Alasdair Brooks