Thames Barrier Pano

My first attempts at panoramas. Not quite as easy as it seems to be; well, not if you pick a subject that requires more than a dozen of shots. Have several ones with awful perspective distortion; still trying to get my head around the physics of it.
This is the best so far. Bigger version here - http://weinheimer.uk/thames-barrier-panorama/
The ever changing light causes exposure differences and seems certain times of day will require manual blending to remove the visible seams. Haven't got around to that yet.

Shot with the 50mm 1.4, 14 bracketed shots, portrait orientation;