In my version of the world, they'd be building a road tunnel underneath for proper double deckers and cars to go through, and closing the bridge entirely to motor vehicles.
Even when fixed this is still not going to resolve the issue that there are too many people needing to take a bus over it, but only single decker buses and managed traffic flow will be allowed. It's bullshit to do yet another expensive temporary patch-up job on an antique bridge designed for horses and penny farthings. Before it was closed, I had to regularly wait 2 or 3 buses due to overcrowding in the morning, and often sat in queues of traffic on the northside waiting to cross back to Barnes.
Replacing it, or building another bridge isn't an option because Grade II with protected views.
Tunnel FTW.