A new, today, collection from English Heritage of historic pictures. The link I have selected is to a section called 'Galleries' and then a subsection 'Off the Grid' of sea and air pictures, then one image 'Cloudscape: 1926' (there is at least one other with the same title).
I will be interested to see what CAS makes of this. One thing you can do is help them identify unknown locatios.
Over to you...
P.S. The site is overloaded hence slow these early days