So, both of the chaffinches have managed to survive. One took a turn for the worst a few days ago and was only making short flights within the cage. The other one was more chirpy, and did escape on a few occasions, out of the cage. They have both been pecking at seeds that we put in the cage, so hopefully they will be able to find food for themselves. I phoned up a local rescue and they advised that the birds should be released. So, we ventured a few miles down the road to our vegan friend, who has lots of land, where there was less chance of cats getting their paws on the birds. When we opened the box, the chirpy one immediately flew off leaving his/her mate behind in the box. We put the box with a little exit hole up in a tree and waited. After a couple of hours he/she also took the plunge and flew off into the trees.
Gramondo managed to take a photo of the first bird to fly off just after it had left.
Then, one photo of the second bird, that waited for a while in its box before leaving. I wonder if they will meet up again, I hope so.