From Westminster Bridge??? Might get some detail just before sunset but it may look strange as you are looking east in this shot, so the light would be at either side.
Cracking shot, what lens are you using??
Picture postcard shot! I love it.
Great shot, I enjoy trying my hand at pano's not tried any at night yet. Might give it ago after seeing yours.
It's a nice pano. It would be better with some colour in the sky, as others have suggested. And I think it would be improved if you cropped off the bottom - say at the bottom of the reflection of the Eye.