Thanks to Simon Williams for sending me this link...
Touching the Tide is a coastal partnership in Suffolk.
Thanks for Simon Williams for passing through details.
It covers an area of the Suffolk coast near Bawdsey, and its Martello tower.
Many years ago now, we followed the LINES OF DEFENCE project, which was in the same area near the Bawdsey tower.
Just checked and it's 10 years ago now that students and I followed the slow decline of the flags - also impressive on a parents' Options evening..