Blue bird

I spotted this bird hopping up a tree trunk and wondered what it might be.  Perhaps someone could identify it.  I wondered if it might be some sort of woodpecker but I did not see it pecking. I spent the morning feeding the sourdough starter ready for tomorrow and making soup with the capon carcass. I had some of the soup for lunch but there are still four tubs left to put in the freezer.  We were invited in the afternoon for aperos with friends. It was really a version of high tea but very pleasant to spend a bit of time socially.  We made it back three minutes before curfew.