"How do you define the coast?"
Very good question. Was thinking the same thing a few weeks back- was looking to extend my VV cluster Coast to Coast and was looking to see where the coast on the Clyde was.
Lots of people quote the length of the river as an exact value, but then say that where the mouth is is vague. I'm going for the Tail of the Bank which means I'd need to extend my cluster to Greenock- quite a bit of work to do there. But that will need to wait post lockdown.
Got two definitely coastal tiles today, at Ruddons Point on the Fife Coast path.
To get all the coastal tiles in Fife, reckon I will need to take to the water around Longannet, Crombie Pier, Port of Rosyth and also an annoying tile off Methil. A couple of tiles on the inner Tay are best accessed from the north Bank.
Two of the trickiest appear to be South of Leuchars Air base, but they have been done.