Surely the point of Remembrance Sunday is to remember the dead? Not to try and tell everyone you used to be in the military. If you are that concerned that people know about your past, you have a veterans badge.
Actually I find they are a good point of contact at these affairs. At a service at the Bomber Command memorial in Green Park I noticed an old gent with a Military Cross at the front of his row. I commented on it and learned that he had won it at Kohima, the scene of some of the most savage hand to hand fighting in the whole war in the Far East. On another occasion. seeing a chap with the South Atlantic Medal I learned that he had been on one of the ships which were lost in the Falklands War.
Mind you nobody has ever asked me to relate my war experiences in Aden when they see my solitary South Arabia GSM. Good job too, as I have never been any good at making up stories!