Or deal with border security having to investigate the validity of my claim of British nationality?
Worst case I apply for an ETA on the spot in front of them? Will report back later how it goes.
I lied (by omission) on my ETA application and was approved in literally under 60 seconds. Cost me $35 to be allowed to enter my own country. Not entirely sure what the point of this system is other than revenue raising to be completely honest - its not as if they formally background check my pinky promise of not being a terrorist or having a criminal record.
The ETA is an authorisation to travel to the UK, it is not an entry clearance. Once you have landed in the UK, it would be pointless making you get an ETA. When you go through immigration the officer or the e-gates will just do the usual checks on your passport. The UKBF currently does not enforce ETAs and leaves it up to the airlines. This may change at some point.
Even if the UK currently does not have access to (for example) European databases of criminal records, and grants you an ETA after you lie about a criminal conviction that the UK doesn't know about, you are relying on the UK not finding out about that conviction later.
More checks may be run when passing through immigration than through the ETA system. So answering honestly may tell you that you need to get a proper visa rather than making you think you are ok to travel and then getting rejected at immigration.
Australia does the same thing with making you lie about not being a citizen, although at least it is free for British passport holders.
Well, otherwise people will potentially leave out pages which might contain things they don’t want the UK passport office to know! One way to check is to get the full passport, including any blank pages.
I assume they want the other passport pages to check you have been deported/refused entry etc anywhere.
British citizen can be revoked in certain circumstances. If you have been deported or had a visa cancelled it might be grounds for the UK to look a bit further. Doesn’t impact many, as few as three people in 2022 (but 104 in 2017).
(source BBC)
HMPO only wants to see foreign passports because they have a policy that British passport holders must only have one name used for all purposes in all countries. The reason for seeing all the pages is because there may be a change of name observation printed on another page.
If you have a different name in a foreign passport they will insist that you get it changed or reapply for the British one in the same name, unless you can demonstrate exceptional difficulty in getting your name changed in the other country - in which case an observation will be printed in the new British passport regarding the other name.
British citizenship can only be cancelled if you are suspected of being a terrorist or if you provided false information when applying for citizenship that would have led to not being granted citizenship. In general, the passport office does not have automatic access to your UKVI records and is not concerned about whether you have been refused entry to another country.
When renewing a British passport in the UK using the in-person premium services, they will flick through the foreign passports but only take a black and white photocopy of the photo page to send on to the processing office (same-day renewals are not permitted for multiple citizens). The photocopy is posted back to you. When applying for a new British passport by post the original foreign passport is also required, not just colour photocopies.