House Hunting??

Today’s picture is of a Blue Tit investigating the middle entrance to the nest box. It kept putting its head in and out of the entrance, so it was quite difficult to photograph, especially as the light was not very good. I did not see it fly away, obviously it did and later in the day I saw the same one, or a different one that was back again.
 
The temperature at GMT noon was twelve degrees Celsius, it has rained and there has been some sunshine, but it is also very windy.