1) This is the TARGET photo, but with a dark sky & supermoon in shot, creating a silhouette. At other times of year, the sky may be more like this, with full-moon in shot, but not in winter.
2) I used triangulation to find the target location.
YELLOW line - my recce on 5th Dec.
ORANGE lines - rough guide by lining up the Gherkin and London Eye as per Target Photo.
BLUE line - I lined up the Shard to miss out Lots Rd Power Station and it's intersection with the red lines gave me a rough target location. Note: in my recce photo, the Power Station was in front of the Shard.
3) Location of recce on 5th Dec 2016 in YELLOW. Triangulation suggests location is anywhere within the ORANGE flight-path and probably close to the BLUE line.
4) This OS map shows the highest point on the BLUE line intersected with Sawyers Hill Road, which can be viewed on Google Street View. Therefore, I used Photo Transit to simulate 300-600mm lenses around the BLUE line.
5) The Photos matched, therefore I found the location!!! It requires a 500mm lens or a 400mm +1.4x TC (560mm).
6) Conclusion: Target location confirmed.
1st Recce - Haze made it impossible to see, but using HDR, I could bring out details invisible to the human eye.
1st Recce - Switch to full-screen to overlay the two images (above and below)
1st Recce - This is a 3-exposure HDR with shots one stop apart. It shows that I'm in the WRONG location, most notably because Lots Road Power Station obscures the view of the Shard, yet it doesn't even feature in the target photo (0) above.
Shot on the evening of my father's funeral on 14th Dec 2016. The moon has not been enlarged - this is how the scene actually looked. It was shot at 16km from the City of London, which explains why the moon looks so big compared to the buildings.
Two exposures were required - one exposing for the city and one exposing for the moon and the two were merged.