A Goldcrest in Jubilee Country Park.
No interactions present.
A female I think, because the crest is yellow rather than orange
Could well be a female, but sometimes, in younger birds, you have to move the yellow feathers aside to find the male's orange ones below..not all males are bright firey orange, some are more yellow.
My Flickr photos...
Lat/Lng: 51.392355, 0.056721666666667
OS grid ref: TQ431679