I've been watching how this is coming together,and enjoying the progress.
However I didn't comment earlier as that bridge always felt out of place (to my eye anyway) ,and didn't feel I could comment until I could suggest a reasonably price alternative.
For me its not got the height or texture/structure to compliment the buildings.(plus the depth and texture of the canal)
So I'd recommend you take a look at Modelux ,I've found they're website a bit ropey (Windows 10 phone gets a huge amount of lag when trying to load each page.) you can find them on eBay as well. They're pre-painted and weathered .the bridges are designed to be use for either road or rail.
They're 'oo' and 'n' gauge. But they'll easily work for 28mm.
I'm not plugging the company and I've put my money where my mouth is and ordered a Gasometer.(just about every big English town had one.)
Mark.