機場用LOTR入境，但個入境官話佢地冇事先申請。
A) 我入境時佢都有講過類似說話，大概係叫你應該申請左bno visa 先入境，最後都蓋左印比我入境
B) show them this link https://www.gov.uk/guidance/british-nationals-overseas-in-hong-kong?
C) LOTR,唔係奉旨, 所以之前聽到有人報告呀有啲較 nice 的關員會放曬水叫你答反應該要答嘅答案(tell them you want to live in UK to apply, and apply the BNO visa in UK)