Are those white passionflowers beautiful! They can take over very quickly. Next door but one has one or two covering their whole tree and that is a MASSIVE tree. I have the ordinary one and I really love eating their fruits for breakfast. Yummy!
This one has edible fruits. Don't know about yours.
Edibility of fruit
P. edulis is the species grown, in warmer climates, for its edible fruit.
The relatively winter-hardy Passiflora caerulea often produces egg-shaped orange fruits in warm British summers. They can be eaten when fully ripe, but please be aware that under-ripe fruits (yellow) can cause stomach upsets.
All other parts of the Passiflora plants are potentially harmful and should not be eaten.