I am headed to London in September and would love to visit this historical site: http://www.19princeletstreet.org.uk/
I've been checking the website often but it seems to be out of date with only 2011 opening dates listed. I've emailed a couple of times with no response. I would appreciate anyone's advice as far as possible times of year the public might be allowed to enter in 2012 (itinerary planning!).