Just passed a flahing rear light by the North end of the underpass under the A90 just up the hill from the Cramond Brig.
Ummed and arr'ed about what to do with it.
Decided to leave it flashing on a low setting on the metal box near the entrance to the subway in the hope that it's owner heads back to try to find it.
I know I've retraced my steps before in the hope that I can find a still flashing light... (to no avail though)