Very sad to hear this news Mark was a good friend whilst serving together in 2 RGJ. All the old guys of support Coy send there condulances to Marks family he will be greatly missed.
Mark Costin was my uncle and godfather. As you do, I sometimes google his name (Never sure what I'll find!) but stumbling across this was absolutely lovely. It's nice to see that people remembered him. Thank you to Ken Ambrose for posting this and thank you everyone else for replying and showing you remembered him and paying your respects.
Thank you to all who remebered him xx It means a lot to me, and I'm sure it means a lot to him wherever he is now!