Perhaps forsythia: https://en.wikipedia.org/wiki/Forsythia
While that looks similar, it seems the flowers are a different shape, the ones on my bushes are bell shaped, two petals and then a piece coming out from the middle. I want to surround my front lawn with them.
Several varieties. Take a cutting to the nursery for an exact match.
Oh good idea! Luckily there's a garden shop right next to my estate.
Turns out it is this, also simply called broom:
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