Blue budgie with yellow chest, missing

I lost my blue budgie yesterday around 3pm near the Corn Exchange on Call Lane in Leeds City Centre. He's a small budgie about 12 cm long, blue body with a bright yellow chest, and a white ring around his left eye. He wears a tiny red leg band with the number 24. He's a bit shy around new people but very tame at home and means a lot to me—it was a gift from my sister. If you spot him, please let me know; he sometimes perches on my shoulder when he trusts you, and I’d really appreciate getting him back.