Five minutes after the great tit drove him off, the bluetit is back ...
... and gets the same reaction.
"Be like that then!"
This was taken a couple of hours later. Again, I'm not sure what led to this display. Was he driving off an unwanted intruder, or is he reacting to a bird inside the box when he didn't expect one?
This shows the response from the bird inside - her beak is open but her wings are still folded, It doesn't look like a hostile reaction to me.
I'm sure they will sort themselves out eventually!
The persistent bluetit seems to be trying to be a humming bird here!
From the amount of time the female was spending in the box, we thought she might roost given half a chance, so at about 10 to 4, I switched off the internal light (and therefore of course, the camera).
At 5 past 4 we were rewarded by seeing the great tit re-enter the box - and the external camera didn't pick it up leaving before dark!
Perhaps we have a rooster!!