Broccoli blown

If you keep it well fed and watered, there should be smaller heads grow from the leaf axils, in the same way that PSB behaves

Crumbs - that was an early crop! If you cut the head off it will grow side-shoots you can harvest for quite a while. I grow summer broccoli and caulis and plant it in a partly-shaded area because I find that they doesn't blow as quickly. Planting very firmly also helps with this.