It has remained cloudy all day as evidenced by my 'extra' taken this afternoon (Arthur's Seat viewed from Seafield, Kirkcaldy).
However, moments before sunset, the sun broke through to spotlight the tankers in the Forth. They really stood out against the dark background.
This one, the closest, is called 'Paterna' - a chemical/oil tanker waiting to head into Grangemouth to pick up its cargo of whatever. I decided to blip this and relegated the other to the 'Extras'.