[cyphar]

> Because usually you are treated as being a citizen of the country whose passport you are travelling on.

By your host country maybe (though I don't agree it's as cut-and-dry as that), but your home country will still treat you as a citizen regardless of your other citizenship statuses (except in the case you are a citizen of your host country). So they should still give you the same aid they'd give any other citizen -- and in some cases the UK has actually helped UK citizens flee a country even though they are a citizen of said country (examples include forced marriages of dual Iran/UK citizens in Iran).