There are now orange plastic barricades attached to the 'new' black railings that further narrow the gap available to cyclists and pedestrians.
Nearby the reunion boat was loading and I had a chat with someone official-looking there, who said that there had been an accident with a car and the railings last week, which prevented them fully closing the bridge, so the orange barriers were being used (not entirely clear how or why).
Not impressed, but I guess it is a temporary restriction.