I am the other blue tit that checking the box out
What a lovely site but I did not snap them both in the box at the same time one fled out of the hole just as I snapped to take a photo image of them hoping they will come back together so I can take another photo later today I keep you posted
Linda's garden and wildlife 
You’d have had to be quick to snap them. It looks like you’ve got prospective tenants. I’ve had a nest box up for a few years but never had any takers, I think it needs moving.
Thank you Jo what type is yours and do you know the direction North ,south East , or West depending it might need moving you never know the camera one was up for two years before anyone moved in along with out little chalet one we have so they might just use it this time round lets hope so anyway have a blessed week