HDR photo from Video at Tower Bridge

It seems crocket , and too bad you have cranes in the background.  Another point that clearly does not jive is the colors. You have blue skies and green waters. That's usually not the case. For the most part, the water will reflect the sky colors. they seem too distant in this case.  Last observation is the noise, it has been pronounced even at this small size.

I'm not sure from where Luis gets his knowledge.

Luis, one only has to own a swimming pool to understand the colour of water, or better still, from where it derives its colour. An overcast early morn/evening will give a greenlike tinge, and as the night wears on, the colour will change to black (without the blue sky to colour it.)

As for the grain, I don't see any on my screen, in its enlarged view form.

Andrew, whilst I enjoy the mood of the image, and the perpendiculars are almost that...... that centre line of light, like a horizon (for me) gives a slant to the image. Optical illusion it may be, but it looks unbalanced.

Damn good shot and the PP work is good..........

Regards