OMG... Goldfinches in my back garden
I haven't seen goldfinches in my back London garden for 10 years at least. (Seen them at the front sporadically ie once every 2 years.) Today I have seen 3. One was on my elderflower tree and the other 2 were picking at old webs on the house.
It just so happened I changed bird feed yesterday, coincidence, do you think? Or just my house getting more webby? 

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we find that they don't know they're supposed to like nyger seed from special feeders and they ignore them, but they absolutely love sunflower hearts.
A A Milne
Ours also love the rudbeckia seed left on the plants late in the autumn.