It is notoriously difficult to prove that you have located a breeding pair of Goldcrest. This is due to the species mostly nesting in tall fir (type ) trees and the difficulty in seeing a nest from the ground.
However, I have long thought the Goldcrest is a breeding bird in our recording area. And today I viewed some excellent evidence which in my opinion strongly supports that view. I observed a female collecting food and with a bill full of food flew off in the direction of some tall fir trees.