There is some footage of the flying boats based on the Scottish isle of Kerrera approx. 33 minutes into this episode available on BBC's iplayer from the series Grand Tours of the Scottish Islands. Some of the previous episodes had some military info, but I can't remember which ones now. http://www.bbc.co.uk/iplayer/episode/b06kq0vc/grand-tours-of-the-scottish-islands-series-1-compilations-60-minutes-episode-4
