Anyone know off hand if there are rules about having a hazard tell tale flasher on the dash/column or are the two flashing indicator tell tales enough?

If we need one, where should it be and does it have to be red?

Not too sure about SVA, but European legislation dictates the switch is illuminated. Not sure either if it has to be a triangle logo, but all are. I MOT'd with a red LED adjacent to a rocker switch no problem. Same goes for fog, that definitely needs an advisory lamp.

AFAIK the switch itself does not necessarily have to be illuminated, but you do need to be able to tell it is on when it is in operation. In the SVA manual it mentions that if you can see the actual indicators then that acts as the telltale. If you have the indicator telltales, that should be enough.