More than 15,000 images from one of the earliest and most significant collections of aerial photography have recently been released. The photos on the Britain from Above website have gone through a painstaking process of conservation and cataloguing. Here's a look at some of the featured.
Tower Bridge and the Tower of London, London, 1921
Terraced housing surrounding Westbury Road,
Brownlow Road and Arnos Park, Bowes Park, 1930
West Pier, Brighton, 1927
Old Man of Hoy, Orkney.