The PhotoLondon resource - PhotoLondon.org.uk - which has been active for many years and hosted by the Museum of London is currently offline. The Museum has recently upgraded its website and may have impacted PhotoLondon. This has been raised with the Museum and is currently under investigation. Sadly, because of the way the site is constructed the underlying data is not visible through archive.org.
Hopefully, the site will be online before too long.
Comments
This is a critical, extremely valuable resource! I hope there is some way we can persuade the Museum of London to support it. All of that data can not just be tossed into the electronic wastebin. How can we help?
UPDATE: conversations are still in hand.