如果你哋有留意呢份嘢嘅話,其實你本英國護照過期與否、是否用英國護照入境根本唔重要。所以點解有人用影印本就上到機,其實蘋果日報所講嘅僥倖先上機。
If you are a dual British national in a third country (that is, a country of which you are not a national), we will offer you our full support. You do not need to be travelling on your British passport.
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/822887/Support_for_British_Nationals_Abroad_Main_Guide.pdf
至於有幾多資料先有用,如果用非英國護照入境第三國,我諗你最好當然係好似嗰個人咁有影印本,但係我覺得最差嘅情況係你有名同香港身份證號碼就已經夠查到你身份。
(當然我哋永遠都係唔會建議大家無事就用特區護照,有事就求英國領事協助,總有場合你無辦法選擇邊個國家嘅領事協助,直接搵你用邊本國家嘅護照入境就搵邊個國家。要確保領事保護由英國提供,請使用英國護照入境第三國)