John Thomas Bayliss 47437 5 Bn Royal Defence Corps and John Baylis 47437 Royal Defence Corps ex 9137 Norfolk Regiment are the same person. However there are two Medal Index Cards in existence. Are you able to merge?
Jane Dickson commented
Thank you for identifying this duplicate. The records are now merged with https://livesofthefirstworldwar.org/lifestory/253131as the Primary. I have also found and added Service Record for him, which uses the 'Baylis' spelling.