An absolutely fascinating site of aerial photography detailing Britain between the years 1919 and 1953 is to be found here
The search facility found this photo of Inchmoan Inchtavannach and Inchconnachan islands on Loch Lomond in 1939
This is Helensburgh on October 7th 1927. If you look closely you can see a Clyde steamer at the pier and what looks to be a small motor boat on the left side heading towards the shore.
This is the Queen Mary at Bowling on her way from Clydebank to face the world in 1936 with a De Havilland Dragon biplane in close attendance:
Continuing on the ship theme, and taken on the same day as the Helensburgh photo, this is the shipyard at Irvine:
Many of the photos of Scotland were taken on 6th/7th October 1927. For example, here is the home of Sevco 5088 in happier times on 06/10/1927: