This is Zoe, the female bluetit who has spent much of the day cleaning up the box. She has been in and out from the start of recording and was only interrupted by events outside her control, namely the fight between Harry and Will.
Today we have had two interesting developments in Box3. A female has started cleaning out Harry's accumulated droppings, and there has been yet another fight between Harry and Will, this time on the floor of the box. (There is a video of this fight to be found under Videos in the left hand menu.)