The British Postal Museum and Archive cares for the visual, written and physical records of more than 400 years of postal development.
The Royal Mail Archive, Freeling House, Phoenix Place
London
WC1
http://www.postalheritage.org.uk
Monday to Wednesday, 10am-5pm. Thursdays, 10am-7pm. Fridays, 10am-5pm. Open on selected Saturdays, 10am-5pm. No appointment needed for most archive material. The philatelic collection may be viewed by appointment - please check for details. Closed Bank Holidays and Christmas week
Free entry to the Search Room and exhibition area. Please bring ID.