Oh dear, I just cannot seem to be able to explain myself, can I?
@MaisyPops: again, I am not saying it is an unbearable intrusion by a police state, I am simply wondering what the logic is. Does simply failing to understand what the logic is make me paranoid?
@gussyfinknottle, as others have pointed out, this has got nothing whatsoever to do with Brexit. It also has nothing whatsoever to do with proving your identity! If I already have a valid British passport which is about to expire and want a new British passport, I need to submit any foreign passport, even if the British one is more than enough to prove my identity.
@RoseAndRose, yes, I thought so, too (count-terrorism checks), but my scepticism is that that’s too easy to game: we are not asked what other nationalities we hold, or where we travelled on other passports, but simply to submit any current passport we may hold. Destroy or “lose” the foreign passport on which you, say, travelled to dodgy destinations, et voila, nothing to show, nothing to declare!!!
The FoI answer states that "is required to support identity and nationality checks. It
is also required to ensure that any British passport issued is compatible with the
biographical and photographic details contained in an existing passport. " which I don't find convincing at all.
@TanteRose, did you renew from the UK or from abroad?
@Globetrotter100 , yes, the rules for those applying from abroad are slightly different, and a photocopy of the foreign passport is all that’s needed. It wasn’t clear from your first post that you had, in fact, sent a photocopy as required.
The guidelines for those applying from the UK are here: www.gov.uk/government/publications/applying-for-a-passport
Page 12 of the PDF has a “table of supporting documents” which very clearly states that “Any other uncancelled passports relating to you” must be submitted in all cases: adult, child, first passport, renewal, etc. Page 5 explicitly clarifies that “uncancelled passports” includes “passports issued to you by other countries.” When I called to inquire, the passport office said that they would only accept a certified copy (not a photocopy made my me) in exceptional cases, like the clearly documented need to travel on the foreign passport for some urgent matter, and, even then, it would be up to the discretion of the case officer reviewing the application.