It's slowly dawning on me...

Looking East towards the Isle of Dogs, with Deptford on the South side and Greenwich just round the corner.
I can't sleep so up early to catch the first day lit low tide for a while.
The fatcatferry slides between Canary Wharf steps and the Rotherhithe Hilton to pick up another cargo of jet-lagged trading floor nomads on their way to never-never land.
For centuries rowboats have ferried workers between these same two shores. I pick up handfuls of their discarded clay pipes every day.
Sigh...