This was a visit to Box1 at a quarter past nine this morning.
At around midday another visit took place.
In it goes.
And off again afterwards.
At half past eleven Box2 also had a visit from a bluetit today. This time it must have been a male.
As usual, the males crouches out of the way of the incoming females ...
... and leaves directly the female touches down!
Off he goes.
The female doesn't stay long. This picture was taken 20 seconds after the one above.
A minute and a half later a bluetit is back. This time there is no swapover.