A Home Office minister, Mike Tapp, has rejected claims that the government failed to adequately communicate new border rules that could see British dual nationals barred from boarding flights to the UK. The former Conservative cabinet minister David Davis said three of his constituents only became aware of the changes through reporting by the Guardian and the BBC. Under the new rules, British dual nationals must present either a valid or expired British passport, or a £589 certificate of entitlement, to prove their right of abode before boarding a plane, ferry or train to the UK
* 时间复杂度: O(nlogn) 空间复杂度: O(n) 稳定: ✓
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Nature, Published online: 27 February 2026; doi:10.1038/s41586-026-10308-x