Network Rail Scotland kindly invited me on a helicopter flight up the West Highland Line from Glasgow to Rannoch, to see how their Air Operations team works - operating imaging equipment that surveys the railway by air.
There's more information on their page here : https://www.networkrail.co.uk/running-the-railway/looking-after-the-railway/our-fleet-machines-and-vehicles/air-operations/
Paul Whitewick Gorton video : https://www.youtube.com/watch?v=ZE81dD45RU0
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