Oscar missing from Taffs Well

Oscar has been missing from Taffs Well since Wednesday 4th December. If anyone is 'taking care of' or has seen a black cat with a soft meow recently, please let me or Matt know. It's unlike him not to come home and we're really worried about him. He's chipped so you can also take him to your nearest vet or Cats Protection who will contact us.
Oscar also has a twin, Marley, who looks very similar but is smaller in build and has a more vocal, 'moany' meow. Marley is still still with us but is missing Oscar dearly x"
I have contacted our vet and have informed PetLog and the council about his disappearance. I've also posted leaflets locally asking neighbours to check their gardens/sheds/garages but have not heard anything yet.
Kind regards,
Mel. If anyone has information please message us at catwelcardiff@yahoo.com and we can forward the info on. Thanks