Green budgie with blue tail found near Grassmarket

I found a small green budgie perched on a cafe railing near Grassmarket this afternoon around 3:45pm. It has a bright lime-green body, a yellow head, and a cobalt-blue tail. There's a blue plastic leg band on the right leg with the digits 04-BG. It seemed healthy, chirping softly, and looked like a pet rather than a wild bird. If anyone recognizes this little guy, please get in touch — I’d really like to help get him back to his owner.