Cockatiel found near Briggate, blue leg band

I found a small cockatiel perched on a cafe chair outside the Leeds Corn Exchange on Briggate this afternoon around 3:15pm. It's a grey-bodied bird with a bright yellow crest and orange cheeks, about the size of a large robin, and it seemed quite friendly, stepping onto my finger when I offered a treat. There's a blue leg band with the number L-42. I'm posting here because I know how worrying it is to lose a pet - hopefully someone recognizes it soon and can claim their little bird. I can bring it to a local vet or rescue center if needed.