What Low Level Risks Should be Considered Whilst Cycling - Advice for Others Please!

[Salad Dodger]

Kamikaze pedestrians.
Seagulls
Wonky manhole (are we still allowed to call them that?) covers

 

[Ajax Bay]

I would say, inspired by your manhole cover post @Salad Dodger , metal surface road 'furniture' and white lines are a risk we all take account of on every single ride: I'm saying they are NOT 'low level.
Very high likelihood; moderately high hazard: so definitely up the right top corner in the risk matrix.
Control measure/mitigations = constant attention and deliberate avoidance; if unavoidable momentary deliberate maintenance of velocity: non-operation of brakes, stay straight and ease off power.
Good luck to those close to the eye of the storm today.

 

[Drago]

Crocodiles. A strangely understated hazard.

 

[Mike_P]

Pothills, those overfilled potholes.

 

[Punkawallah]

Would a lot of there be weather/season dependent?

 

[presta]

Wonky manhole (are we still allowed to call them that?) covers

Or missing manhole covers.