It is not falling down; the brickwork pictured is cosmetic. The structural integrity of the bridge depends upon granite arches and concrete piers. The blocks of the arches rest on steel girders, the ends of which rest on watertight iron sand boxes founded on timber piles driven into the river bed. This is why it has not been closed due to the observations of some random builder.The other point to bear in mind is the work involved with the Thames Tideway tunnel nearby. No way would their engineers not have made repeated checks on any recent movement in the bridge.
Michael Winstanley ● 1886d