Pretty sure the eggs are P. atomaria, and I have photos of larvae of this species showing smaller ones looking like yours next to later instar ones that have the black dorsal and lateral stripes typical of this species, so I'd say yours are earlier instar larvae of this species. Fancy them getting all the way out there.
I think after comparing these again with my shots of larval P. atomaria I'm confident enough to confirm them (and in the interests of whittling down the unidentified species a bit!).