How do you trace a relative that was in the scots guards in 1971?
Check old pictures, letters, anything that might have a postmark or location as to where he was during a certain period also, as you might find someone online at a Vet site who remembers him and might even know where he is. Veterans are as close or closer than family members, and tend to stay in touch over the years. Your best bet is with the Scots Guard unit he was in. You can also contact the current unit – all military units have a way of tracking down old members, especially officers in case of national emergencies. In 90% of the case it’s not an issue, but they keep track anyway – just in case.