Newbie help

Hello, new member here not 100% sure this is the correct place ask this so please be kind. I have also posted in another thread which I think was incorrect. I have a Mirca SE 5 door which we have brought for my son as his first car. Unfortunately battery went flat and there is no record of the radio code please if you can help I would be very grateful. I have managed to remove the radio after some struggling and the serial number stamped onto the radio (no sticker in place?) is BP334947282271. Also has 8 635 123 393 0 stamped on? Any help or further advice would be great.