Donald, as someone who likes a lot of contrast in B&W ( since joining CIC forums I believe it may just be a phase in my digital photography childhood!) I really like the subtlety of your image here. For me it really captures the grandness of the bridge as it was intended by Messrs Baker and Fowler when they designed it. The calmness of the early morning adds to the scale and I think the sharpness in the brickwork on the LHS is fine as it is not a smooth surface and will catch shadows.
Like others, I am really inspired to explore B&W and wonder if you feel Silver Efex Pro is a wise investment alongside photoshop? Looking forward to enjoying the others from the shoot.