Sorry Abraham, I don't know how to do the quote thing yet.
"Furthermore, can anyone tell me how the following occurs re. the use of flags. Why the difference?"
Scottish soldier's funeral - Scottish flag
Scottish soldier's funeral - British flag
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I suspect that the use of the Saltire there was simply a family decision and nothing to do with protocal and recived etiquette. The Scots tend to have a healthy respect for protocal rather than being overly bound by it.