After parking bike near Waverley Station for a few hours tonight, came out to what I thought initially was someone having locked their bike through mine, onto the railings.
Closer look showed that they'd locked their D lock through my D-lock. So at least I could get my bike unlocked.
But sorry, dear Cannondale Synapse rider, I did hang around and look for you for a fair bit, but there was no way I could lock your bike up again. Did the best I could to make it look like it was still locked.
But if its gone, that's down to your rubbish parking.