The Cut Bridge linking King's Lynn with West Lynn has no safe cycle facility, despite linking two sections of reasonably good quality cycleway. There is a narrow (1.2m) footway which cyclists often (illegally) use but it is too narrow to pass a pedestrian or another cyclist. There is also a low parapet with a risk of a cyclist being knocked over into the river in the event of a collision. This would almost certainly be fatal.
The 'correct' way to cross the bridge is to rejoin the carriageway, which involves (westbound) crossing on a fast, blind bend then back again after the bridge.
1) 20mph limit extended over the bridge - preferably accompanied by average-speed cameras.
2) Narrow the road and install a wider (Min 3+1 m) shared-use path.
3) Reduce the road to a single, bi-directional lane with a full-width (2m) cycle lane either side.