Delivery - Uber eats on the wing?

Not a great angle, but if you look very hard you can see the fish's head in the young terns beak.

I watched for ages, and what was happening was the adult would fly over the roost calling, the young one would fly down to the water, then the adult would fly in and feed on the wing. This appeared to be to stop the gulls, or other terns getting the fish.