These photos show Sheffield as you rarely get to see it - from above.
They take you back through decades of change in the city centre, from the early 1930s to the mid-90s.
Pictured are many of the landmarks which have come and gone during that period, including the Regent Cinema at Barker's Pool, Grosvenor House Hotel and the notorious Egg Box town hall extension.
Standing proud amid all the new developments are historic buildings like Sheffield Town Hall, Sheffield Cathedral and Sheffield Midland Station.
This retro photo gallery reveals how the city has evolved over time, showing one of the old gasometers which were once a common sight around the country and the former Central Fire Station which is today a popular bar.
It also captures changes to the Peace Gardens and famous streets like Fargate and The Moor.
13. The Moor
Looking down at The Moor, Sheffield city centre, and (bottom right) London Road from the Lansdowne flats, Sharrow, in 1970. The old Barclays Bank is visible in the bottom left. | Picture Sheffield/Sheffield Newspapers Ltd Photo: Picture Sheffield/Sheffield Newspapers Ltd
14. Egg Box under construction
Sheffield city centre seen from above in 1974, showing the construction of the town hall extension, known as the Egg Box, with the Register Office and Redvers House (below crane) | Picture Sheffield Photo: Picture Sheffield
15. Fargate
Fargate, Sheffield city centre, from above in 1994, including the old Goodwin Fountain near Sheffield Town Hall | Picture Sheffield/Sheffield Newspapers Ltd Photo: Picture Sheffield/Sheffield Newspapers Ltd
16. Charter Row
Charter Row, Sheffield, in 1994, showing the Grosvenor House Hotel, top right, with Eldon House (telephone exchange) to the left | Picture Sheffield/Sheffield Newspapers Photo: Picture Sheffield/Sheffield Newspapers