I was filming a Greenfinch and a Chaffinch at the seed feeder. On the cables above the feeder was a juvenile Greenfinch. The adult flew up to the juvenile and started to feed it. Fascinating the amount of wing flapping the juvenile does which must be to encourage the adult to pass over the seeds. Before and after this action it was perfectly steady and could fly easily.
There might have been more to see if a gang of Starlings hadn't barged in at the wrong moment!