Just before I took this photo the Robin on the right had brought a seed from another feeder and gave it to the other:
Two possibilities here. This can happen in the mating season where the male feeds the female as part of the bonding process. Alternatively it could be an adult feeding a fledgling. I lean towards the latter. Either way it is not very often two Robins can be seen so close together without a vicious fight starting.
* As Adrian reminded me, a juvenile Robin would have been speckled and not bright red so this must have been a pair. *
Great Tit Nestbox
The babies have grown really fast these past few days and the way they are climbing out of the nest and exercising their wings means it won't be very long before they fledge:
It is getting crowded in there even with only four youngsters.
Even more so when mum joins them for the night: