Well the little magpie grew up very quickly and returned to the treetops where he/she belongs.
We kept on feeding the chick along with his parents and 11 days after we found him he took to the skies like a veteran. Sad but sweet.
We have seen him in the garden a number of times, looks happy and learning the ropes from the parents. Hopefully he will remember us and come visit for a feed now and then.