As the guys before have said, this is a total non-issue. 2 x BDU and 2 x HE (unidentified, but I suspect MK83s).
They were jettisoned "safe." Hell will freeze over before the things explode.
As usual, with an election coming up, our greenies are trying to get mileage by panicking a dumb public on matters they know squat about - the greenies and the public.
As the old bumper sticker said:
"Fertilise the forest; doze in a greenie."