Cardiff City's Emiliano Sala was on board an aircraft which vanished over the Channel Islands.
No deal makes hard border obvious, says EC spokesman, but Irish government calls that unacceptable.
Motorists are being warned of hazardous driving conditions for Wednesday morning.
The fungus from bird droppings was a "contributing factor" in the death of the youngster at a Glasgow hospital.
The naturalist tells Prince William people must look after the natural world, or it will be wrecked.