The picture shows an apple tree in the garden next door. Faith spotted the comb after the leaves came down in Autumn 2016. In between seeing it and taking this photo something has been munching the edges somewhat; it was originally a smooth shape. A beeline between this and our hives is about 20 metres. The builders at work next door last summer did mention bee activity around the loft conversion they built.
Following Will’s Headington colony in a tree this behaviour in Summertown shows some bees trying different tactics. They clearly failed this time but if it keeps getting warmer they may succeed in the future? Or, there were no tactics; it was a cock-up!