# Rare pictures of St Paul's Cathedral and Blackpool Tower are included in treasured collection made freely available on new Britain from Above website
# Others show the 1935 FA Cup final, the Queen Mary's maiden voyage in 1936 and the 1947 Thames Flood
# More than 15,000 photographs taken between 1919 and 1953 have been uploaded on to the site
# Many were so old and fragile that they were close to being beyond repair
# Experts appeal to the public for information on pictures they can't identify
# Conservationists plan to put 95,000 images on the website by the end of 2014