British airways lost my luggage several times ...I changed at Birmingham to go to Frankfurt .my luggage went to Paris....they delivered luggage to my hotel and to my home within 48 hours....they allowed me to buy necessary items ie toiletries and change of clothes if not delivered within 24 hours and reimbursed me...I had to fill in a card at luggage pick up point when it didn't show though..all you can do is phone airline with flight details , description of luggage and your son's location and phone number...Good luck