On one of my country walks there is a double hedgerow with a pathway between it.
I have observed Goldfinch in that area in the past.
Today there were two pairs of Goldfinch at that location.
It appeared to me that they were having a dispute over a nesting site.
This continued for quite some time and involved a lot of flying around and chasing each other away from the site. This enabled a lot of flight shots even though I didn't really have the best lens for the task.